fix gedit style issues.

fixes #312

gtk-3.20/scss/apps/_gedit.scss

@@ -129,4 +129,14 @@
         padding: $spacing / 2;
         color: mix($text_color, $base_color, .5);
     }
+
+    .gedit-bottom-panel-paned,
+    .gedit-side-panel-paned,
+    paned.titlebar {
+        margin-right: 0px;
+     }
+
+    .gedit-bottom-panel-paned notebook {
+        border-top: none;
+     }
 }

gtk-3.20/scss/widgets/_menu.scss

@@ -53,10 +53,15 @@
 
         &:selected { background-color: $selected_bg_color; }
 
+        // A little hack to get some extra space above/below menuitem separators
         separator {
-            padding: 0;
             border-style: none;
-            background-color: shade($menu_bg_color, ($contrast + .1));
+            background-color: transparent;
+            min-height: 5px;
+            border-bottom-style: solid;
+            border-bottom-width: 1px;
+            border-bottom-color: shade($menu_bg_color, ($contrast + .1));
+            padding: 0;
         }
 
         menuitem {

gtk-3.20/scss/widgets/_view.scss

@@ -91,8 +91,8 @@
         -GtkTreeView-tree-line-width: 1;
         -GtkTreeView-tree-line-pattern: '';
 
-        border-left-color: mix($fg_color, $base_color, .5); // this is actually the tree lines color,
+        border-left-color: mix($dark_bg_color, $base_color, .2); // this is actually the tree lines color,
-        border-top-color: $bg_color;                         // while this is the grid lines color, better then nothing
+        border-top-color: mix($dark_bg_color, $base_color, .2);  // while this is the grid lines color, better then nothing
 
         rubberband { @extend rubberband; } // to avoid borders being overridden by the previously set props
 
@@ -280,7 +280,7 @@
 ************/
 
 @include exports("separator") {
-    .view.separator, .separator {
+    view separator, separator {
         color: shade($bg_color, ($contrast + .1));
         border: 1px solid currentColor;
     }