linked buttons don't need margins

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

@@ -849,6 +849,9 @@ toolbar, .inline-toolbar {
   toolbar:not(.inline-toolbar):not(.osd) button, .inline-toolbar:not(.inline-toolbar):not(.osd) button {
     margin-right: 1px;
     margin-bottom: 1px; }
+  toolbar:not(.inline-toolbar):not(.osd) .linked > button, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > button,
+  toolbar:not(.inline-toolbar):not(.osd) .linked > entry, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > entry {
+    margin-right: 0; }
 
 .primary-toolbar {
   color: rgba(207, 218, 231, 0.8);

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

@@ -848,6 +848,9 @@ toolbar, .inline-toolbar {
   toolbar:not(.inline-toolbar):not(.osd) button, .inline-toolbar:not(.inline-toolbar):not(.osd) button {
     margin-right: 1px;
     margin-bottom: 1px; }
+  toolbar:not(.inline-toolbar):not(.osd) .linked > button, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > button,
+  toolbar:not(.inline-toolbar):not(.osd) .linked > entry, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > entry {
+    margin-right: 0; }
 
 .primary-toolbar {
   color: rgba(207, 218, 231, 0.8);

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

@@ -849,6 +849,9 @@ toolbar, .inline-toolbar {
   toolbar:not(.inline-toolbar):not(.osd) button, .inline-toolbar:not(.inline-toolbar):not(.osd) button {
     margin-right: 1px;
     margin-bottom: 1px; }
+  toolbar:not(.inline-toolbar):not(.osd) .linked > button, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > button,
+  toolbar:not(.inline-toolbar):not(.osd) .linked > entry, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > entry {
+    margin-right: 0; }
 
 .primary-toolbar {
   color: rgba(207, 218, 231, 0.8);

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

@@ -848,6 +848,9 @@ toolbar, .inline-toolbar {
   toolbar:not(.inline-toolbar):not(.osd) button, .inline-toolbar:not(.inline-toolbar):not(.osd) button {
     margin-right: 1px;
     margin-bottom: 1px; }
+  toolbar:not(.inline-toolbar):not(.osd) .linked > button, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > button,
+  toolbar:not(.inline-toolbar):not(.osd) .linked > entry, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > entry {
+    margin-right: 0; }
 
 .primary-toolbar {
   color: rgba(207, 218, 231, 0.8);

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

@@ -848,6 +848,9 @@ toolbar, .inline-toolbar {
   toolbar:not(.inline-toolbar):not(.osd) button, .inline-toolbar:not(.inline-toolbar):not(.osd) button {
     margin-right: 1px;
     margin-bottom: 1px; }
+  toolbar:not(.inline-toolbar):not(.osd) .linked > button, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > button,
+  toolbar:not(.inline-toolbar):not(.osd) .linked > entry, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > entry {
+    margin-right: 0; }
 
 .primary-toolbar {
   color: rgba(82, 93, 118, 0.8);

common/gtk-3.0/3.20/gtk.css

@@ -848,6 +848,9 @@ toolbar, .inline-toolbar {
   toolbar:not(.inline-toolbar):not(.osd) button, .inline-toolbar:not(.inline-toolbar):not(.osd) button {
     margin-right: 1px;
     margin-bottom: 1px; }
+  toolbar:not(.inline-toolbar):not(.osd) .linked > button, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > button,
+  toolbar:not(.inline-toolbar):not(.osd) .linked > entry, .inline-toolbar:not(.inline-toolbar):not(.osd) .linked > entry {
+    margin-right: 0; }
 
 .primary-toolbar {
   color: rgba(82, 93, 118, 0.8);

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

@@ -892,6 +892,8 @@ toolbar {
       margin-right: 1px;
       margin-bottom: 1px;
     }
+    .linked > button,
+    .linked > entry { margin-right:0; }
   }
 }