gtk 3.20: try to fix unity decorations (#660)

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

@@ -3601,7 +3601,8 @@ UnityDecoration {
     UnityDecoration .top:backdrop {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
-  UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+  UnityDecoration .left, UnityDecoration .right, UnityDecoration .bottom,
+  UnityDecoration .left:backdrop, UnityDecoration .right:backdrop, UnityDecoration .bottom:backdrop {
     background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(32, 35, 43, 0.97), rgba(32, 35, 43, 0.97)); }
 

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

@@ -3600,7 +3600,8 @@ UnityDecoration {
     UnityDecoration .top:backdrop {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
-  UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+  UnityDecoration .left, UnityDecoration .right, UnityDecoration .bottom,
+  UnityDecoration .left:backdrop, UnityDecoration .right:backdrop, UnityDecoration .bottom:backdrop {
     background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(32, 35, 43, 0.97), rgba(32, 35, 43, 0.97)); }
 

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

@@ -3601,7 +3601,8 @@ UnityDecoration {
     UnityDecoration .top:backdrop {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
-  UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+  UnityDecoration .left, UnityDecoration .right, UnityDecoration .bottom,
+  UnityDecoration .left:backdrop, UnityDecoration .right:backdrop, UnityDecoration .bottom:backdrop {
     background-color: transparent;
     background-image: linear-gradient(to bottom, #20232b, #20232b); }
 

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

@@ -3600,7 +3600,8 @@ UnityDecoration {
     UnityDecoration .top:backdrop {
       border-bottom-width: 0;
       color: rgba(207, 218, 231, 0.5); }
-  UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+  UnityDecoration .left, UnityDecoration .right, UnityDecoration .bottom,
+  UnityDecoration .left:backdrop, UnityDecoration .right:backdrop, UnityDecoration .bottom:backdrop {
     background-color: transparent;
     background-image: linear-gradient(to bottom, #20232b, #20232b); }
 

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

@@ -3604,7 +3604,8 @@ UnityDecoration {
     UnityDecoration .top:backdrop {
       border-bottom-width: 0;
       color: rgba(82, 93, 118, 0.5); }
-  UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+  UnityDecoration .left, UnityDecoration .right, UnityDecoration .bottom,
+  UnityDecoration .left:backdrop, UnityDecoration .right:backdrop, UnityDecoration .bottom:backdrop {
     background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.1)); }
 

common/gtk-3.0/3.20/gtk.css

@@ -3604,7 +3604,8 @@ UnityDecoration {
     UnityDecoration .top:backdrop {
       border-bottom-width: 0;
       color: rgba(82, 93, 118, 0.5); }
-  UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom, UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
+  UnityDecoration .left, UnityDecoration .right, UnityDecoration .bottom,
+  UnityDecoration .left:backdrop, UnityDecoration .right:backdrop, UnityDecoration .bottom:backdrop {
     background-color: transparent;
     background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.1)); }
 

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

@@ -17,7 +17,7 @@ UnityDecoration {
   -UnityDecoration-title-fade: 35px;
   -UnityDecoration-title-alignment: 0.0;
 
-  &.top {
+  .top {
     border: 1px solid if($darker=='true' or $variant == 'dark', darken($header_bg, 7%), transparentize(black, 0.9));
     border-bottom-width: 0;
     border-radius: 4px 4px 0 0;
@@ -34,8 +34,8 @@ UnityDecoration {
       color: transparentize($header_fg, 0.3);
     }
   }
-  &.left, &.right, &.bottom,
-  &.left:backdrop, &.right:backdrop, &.bottom:backdrop {
+  .left, .right, .bottom,
+  .left:backdrop, .right:backdrop, .bottom:backdrop {
     background-color: transparent;
     background-image: _solid(if($darker=='true' or $variant == 'dark', darken($header_bg, 7%), transparentize(black, 0.9)));
   }