more builder tweaks

common/gtk-3.0/3.20/gtk-dark.css

@@ -3316,10 +3316,11 @@ entry.search.preferences-search {
   border-bottom: 1px solid #2b2e39;
   border-radius: 0; }
 
-preferences stacksidebar.sidebar {
-  background-color: #404552; }
-  preferences stacksidebar.sidebar list separator {
-    background-color: transparent; }
+preferences stacksidebar.sidebar list {
+  background-image: linear-gradient(to bottom, #404552, #404552); }
+
+preferences stacksidebar.sidebar list separator {
+  background-color: transparent; }
 
 devhelppanel entry:focus,
 symboltreepanel entry:focus {
@@ -3340,6 +3341,12 @@ gstyleslidein #palette_controls button.toggle:checked,
 gstyleslidein #components_controls button.toggle:checked {
   color: #D3DAE3; }
 
+configurationview entry.flat {
+  background: none; }
+
+configurationview list {
+  border-width: 0; }
+
 .documents-scrolledwin.frame {
   border-width: 0; }
 

common/gtk-3.0/3.20/gtk-darker.css

@@ -3315,10 +3315,11 @@ entry.search.preferences-search {
   border-bottom: 1px solid #dcdfe3;
   border-radius: 0; }
 
-preferences stacksidebar.sidebar {
-  background-color: #ffffff; }
-  preferences stacksidebar.sidebar list separator {
-    background-color: transparent; }
+preferences stacksidebar.sidebar list {
+  background-image: linear-gradient(to bottom, #ffffff, #ffffff); }
+
+preferences stacksidebar.sidebar list separator {
+  background-color: transparent; }
 
 devhelppanel entry:focus,
 symboltreepanel entry:focus {
@@ -3339,6 +3340,12 @@ gstyleslidein #palette_controls button.toggle:checked,
 gstyleslidein #components_controls button.toggle:checked {
   color: #5c616c; }
 
+configurationview entry.flat {
+  background: none; }
+
+configurationview list {
+  border-width: 0; }
+
 .documents-scrolledwin.frame {
   border-width: 0; }
 

common/gtk-3.0/3.20/gtk-solid-dark.css

@@ -3316,10 +3316,11 @@ entry.search.preferences-search {
   border-bottom: 1px solid #2b2e39;
   border-radius: 0; }
 
-preferences stacksidebar.sidebar {
-  background-color: #404552; }
-  preferences stacksidebar.sidebar list separator {
-    background-color: transparent; }
+preferences stacksidebar.sidebar list {
+  background-image: linear-gradient(to bottom, #404552, #404552); }
+
+preferences stacksidebar.sidebar list separator {
+  background-color: transparent; }
 
 devhelppanel entry:focus,
 symboltreepanel entry:focus {
@@ -3340,6 +3341,12 @@ gstyleslidein #palette_controls button.toggle:checked,
 gstyleslidein #components_controls button.toggle:checked {
   color: #D3DAE3; }
 
+configurationview entry.flat {
+  background: none; }
+
+configurationview list {
+  border-width: 0; }
+
 .documents-scrolledwin.frame {
   border-width: 0; }
 

common/gtk-3.0/3.20/gtk-solid-darker.css

@@ -3315,10 +3315,11 @@ entry.search.preferences-search {
   border-bottom: 1px solid #dcdfe3;
   border-radius: 0; }
 
-preferences stacksidebar.sidebar {
-  background-color: #ffffff; }
-  preferences stacksidebar.sidebar list separator {
-    background-color: transparent; }
+preferences stacksidebar.sidebar list {
+  background-image: linear-gradient(to bottom, #ffffff, #ffffff); }
+
+preferences stacksidebar.sidebar list separator {
+  background-color: transparent; }
 
 devhelppanel entry:focus,
 symboltreepanel entry:focus {
@@ -3339,6 +3340,12 @@ gstyleslidein #palette_controls button.toggle:checked,
 gstyleslidein #components_controls button.toggle:checked {
   color: #5c616c; }
 
+configurationview entry.flat {
+  background: none; }
+
+configurationview list {
+  border-width: 0; }
+
 .documents-scrolledwin.frame {
   border-width: 0; }
 

common/gtk-3.0/3.20/gtk-solid.css

@@ -3319,10 +3319,11 @@ entry.search.preferences-search {
   border-bottom: 1px solid #dcdfe3;
   border-radius: 0; }
 
-preferences stacksidebar.sidebar {
-  background-color: #ffffff; }
-  preferences stacksidebar.sidebar list separator {
-    background-color: transparent; }
+preferences stacksidebar.sidebar list {
+  background-image: linear-gradient(to bottom, #ffffff, #ffffff); }
+
+preferences stacksidebar.sidebar list separator {
+  background-color: transparent; }
 
 devhelppanel entry:focus,
 symboltreepanel entry:focus {
@@ -3343,6 +3344,12 @@ gstyleslidein #palette_controls button.toggle:checked,
 gstyleslidein #components_controls button.toggle:checked {
   color: #5c616c; }
 
+configurationview entry.flat {
+  background: none; }
+
+configurationview list {
+  border-width: 0; }
+
 .documents-scrolledwin.frame {
   border-width: 0; }
 

common/gtk-3.0/3.20/gtk.css

@@ -3319,10 +3319,11 @@ entry.search.preferences-search {
   border-bottom: 1px solid #dcdfe3;
   border-radius: 0; }
 
-preferences stacksidebar.sidebar {
-  background-color: #ffffff; }
-  preferences stacksidebar.sidebar list separator {
-    background-color: transparent; }
+preferences stacksidebar.sidebar list {
+  background-image: linear-gradient(to bottom, #ffffff, #ffffff); }
+
+preferences stacksidebar.sidebar list separator {
+  background-color: transparent; }
 
 devhelppanel entry:focus,
 symboltreepanel entry:focus {
@@ -3343,6 +3344,12 @@ gstyleslidein #palette_controls button.toggle:checked,
 gstyleslidein #components_controls button.toggle:checked {
   color: #5c616c; }
 
+configurationview entry.flat {
+  background: none; }
+
+configurationview list {
+  border-width: 0; }
+
 .documents-scrolledwin.frame {
   border-width: 0; }
 

common/gtk-3.0/3.20/sass/_applications.scss

@@ -285,6 +285,8 @@ $disk_space_free: darken($bg_color, 3%);
 //
 // Gnome Builder
 //
+// TODO: Merge this with the upstream stylesheet
+
 .gb-search-entry-occurrences-tag { background: none; }
 
 workbench.csd > stack.titlebar:not(headerbar) {
@@ -395,7 +397,7 @@ entry.search.preferences-search {
 }
 
 preferences stacksidebar.sidebar {
-  background-color: $base_color;
+  list { background-image: _solid($base_color); }
 
   list separator { background-color: transparent; }
 }
@@ -420,6 +422,11 @@ gstyleslidein {
   }
 }
 
+configurationview {
+  entry.flat { background: none; }
+  list { border-width: 0; }
+}
+
 //
 // Epiphany
 //