epic: getting rid of vue -- part 2

Signed-off-by: Roman <ixrock@gmail.com>

src/renderer/components/app.scss

@@ -2,14 +2,14 @@
 @import "fonts";
 
 *, *:before, *:after {
+  @include set-draggable(false);
+
   box-sizing: border-box;
   padding: 0;
   margin: 0;
   border: 0;
   outline: none;
   -webkit-font-smoothing: antialiased;
-  -webkit-user-drag: none;
-  -webkit-app-region: no-drag;
 }
 
 ::selection {
@@ -167,14 +167,6 @@ a {
   }
 }
 
-.drag {
-  -webkit-app-region: drag;
-}
-
-.nodrag {
-  -webkit-app-region: no-drag;
-}
-
 // app's common loading indicator, displaying on the route transitions
 #loading {
   position: absolute;

src/renderer/components/mixins.scss

@@ -89,3 +89,13 @@
   text-decoration: underline;
   cursor: pointer;
 }
+
+@mixin set-draggable($isDraggable: true) {
+  @if ($isDraggable) {
+    -webkit-user-drag: auto;
+    -webkit-app-region: drag;
+  } @else {
+    -webkit-user-drag: none;
+    -webkit-app-region: no-drag;
+  }
+}