hide separator in font and filechooser buttons

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

@@ -480,6 +480,8 @@ button {
     background-position: right 3px, right 2px; }
     .stack-switcher > button.needs-attention > label:dir(rtl), .stack-switcher > button.needs-attention > image:dir(rtl), button stacksidebar row.needs-attention > label:dir(rtl), stacksidebar button row.needs-attention > label:dir(rtl) {
       background-position: left 3px, left 2px; }
+  button.font separator, button.file separator {
+    background-color: transparent; }
   .inline-toolbar button, .inline-toolbar button:backdrop {
     border-radius: 2px;
     border-width: 1px; }

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

@@ -479,6 +479,8 @@ button {
     background-position: right 3px, right 4px; }
     .stack-switcher > button.needs-attention > label:dir(rtl), .stack-switcher > button.needs-attention > image:dir(rtl), button stacksidebar row.needs-attention > label:dir(rtl), stacksidebar button row.needs-attention > label:dir(rtl) {
       background-position: left 3px, left 4px; }
+  button.font separator, button.file separator {
+    background-color: transparent; }
   .inline-toolbar button, .inline-toolbar button:backdrop {
     border-radius: 2px;
     border-width: 1px; }

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

@@ -480,6 +480,8 @@ button {
     background-position: right 3px, right 2px; }
     .stack-switcher > button.needs-attention > label:dir(rtl), .stack-switcher > button.needs-attention > image:dir(rtl), button stacksidebar row.needs-attention > label:dir(rtl), stacksidebar button row.needs-attention > label:dir(rtl) {
       background-position: left 3px, left 2px; }
+  button.font separator, button.file separator {
+    background-color: transparent; }
   .inline-toolbar button, .inline-toolbar button:backdrop {
     border-radius: 2px;
     border-width: 1px; }

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

@@ -479,6 +479,8 @@ button {
     background-position: right 3px, right 4px; }
     .stack-switcher > button.needs-attention > label:dir(rtl), .stack-switcher > button.needs-attention > image:dir(rtl), button stacksidebar row.needs-attention > label:dir(rtl), stacksidebar button row.needs-attention > label:dir(rtl) {
       background-position: left 3px, left 4px; }
+  button.font separator, button.file separator {
+    background-color: transparent; }
   .inline-toolbar button, .inline-toolbar button:backdrop {
     border-radius: 2px;
     border-width: 1px; }

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

@@ -479,6 +479,8 @@ button {
     background-position: right 3px, right 4px; }
     .stack-switcher > button.needs-attention > label:dir(rtl), .stack-switcher > button.needs-attention > image:dir(rtl), button stacksidebar row.needs-attention > label:dir(rtl), stacksidebar button row.needs-attention > label:dir(rtl) {
       background-position: left 3px, left 4px; }
+  button.font separator, button.file separator {
+    background-color: transparent; }
   .inline-toolbar button, .inline-toolbar button:backdrop {
     border-radius: 2px;
     border-width: 1px; }

common/gtk-3.0/3.20/gtk.css

@@ -479,6 +479,8 @@ button {
     background-position: right 3px, right 4px; }
     .stack-switcher > button.needs-attention > label:dir(rtl), .stack-switcher > button.needs-attention > image:dir(rtl), button stacksidebar row.needs-attention > label:dir(rtl), stacksidebar button row.needs-attention > label:dir(rtl) {
       background-position: left 3px, left 4px; }
+  button.font separator, button.file separator {
+    background-color: transparent; }
   .inline-toolbar button, .inline-toolbar button:backdrop {
     border-radius: 2px;
     border-width: 1px; }

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

@@ -546,6 +546,10 @@ button {
     }
   }
 
+  // hide separators
+  &.font,
+  &.file { separator { background-color: transparent; }}
+
   //inline-toolbar buttons
   .inline-toolbar &, .inline-toolbar &:backdrop {
     border-radius: 2px;