HC: whitespace for sidebar

- make some room around the sidebar icons

https://bugzilla.gnome.org/show_bug.cgi?id=752960

gtk/theme/HighContrast/_common.scss

@@ -2112,6 +2112,28 @@ GtkFileChooserDialog {
   }
 }
 
+$_placesidebar_icons_opacity: 0.9;
+GtkSidebarRow {
+  // Needs overriding of the GtkListBoxRow padding
+  @at-root .list-row {
+    padding: 0px;
+  }
+  // Using margins/padding directly in the SidebarRow
+  // will make the animation of the new bookmark row jump
+  .sidebar-revealer {
+    padding: 4px 14px 4px 12px;
+  }
+  .sidebar-icon {
+    opacity: $_placesidebar_icons_opacity; // dim the device icons
+    &:dir(ltr) { padding-right: 8px; }
+    &:dir(rtl) { padding-left: 8px; }
+  }
+  .sidebar-label {
+    &:dir(ltr) { padding-right: 2px; }
+    &:dir(rtl) { padding-left: 2px; }
+  }
+}
+
 // Places sidebar is a special case, since the view here have to look like chrome not content, so we override text color
 GtkPlacesSidebar.sidebar .view {
 

gtk/theme/HighContrast/gtk.css

@@ -2216,12 +2216,10 @@ GtkCalendar {
 .message-dialog .dialog-action-area .button {
   padding: 8px; }
 
-.message-dialog {
-  -GtkDialog-button-spacing: 0; }
-  .message-dialog .titlebar {
+.message-dialog .titlebar {
   border-style: none;
   box-shadow: inset 0 1px #fff; }
-  .message-dialog.csd {
+.message-dialog.csd {
   border-bottom-left-radius: 9px;
   border-bottom-right-radius: 9px; }
   .message-dialog.csd .dialog-action-area .button {
@@ -2398,6 +2396,21 @@ GtkFileChooserDialog .dialog-action-box {
       border-right: none;
       border-left: 1px solid #7f7f7f; }
 
+.list-row {
+  padding: 0px; }
+GtkSidebarRow .sidebar-revealer {
+  padding: 4px 14px 4px 12px; }
+GtkSidebarRow .sidebar-icon {
+  opacity: 0.9; }
+  GtkSidebarRow .sidebar-icon:dir(ltr) {
+    padding-right: 8px; }
+  GtkSidebarRow .sidebar-icon:dir(rtl) {
+    padding-left: 8px; }
+GtkSidebarRow .sidebar-label:dir(ltr) {
+  padding-right: 2px; }
+GtkSidebarRow .sidebar-label:dir(rtl) {
+  padding-left: 2px; }
+
 GtkPlacesSidebar.sidebar .view {
   color: #000;
   background-color: transparent; }