Mint-Y cinnamon: GWL: use fixed size font for window count badge (#524)

So that it isn't affected by user font scaling

Author: fredcw

src/Mint-Y/cinnamon/cinnamon-dark.css

@@ -1231,7 +1231,7 @@ StScrollBar {
   padding-left: 4px; }
 
 .grouped-window-list-number-label {
-  font-size: 0.8em;
+  font-size: 10px;
   z-index: 99;
   color: #ffffff; }
 

src/Mint-Y/cinnamon/cinnamon.css

@@ -1231,7 +1231,7 @@ StScrollBar {
   padding-left: 4px; }
 
 .grouped-window-list-number-label {
-  font-size: 0.8em;
+  font-size: 10px;
   z-index: 99;
   color: #ffffff; }
 

src/Mint-Y/cinnamon/sass/_common.scss

@@ -1639,7 +1639,7 @@ $base_padding: 7px;
   }
 
   &-number-label {
-    font-size: 0.8em;
+    font-size: 10px;
     z-index: 99;
     color: $selected_fg_color;
   }