[gnome-shell-sass] theme: Replace corner ripple png assets with css

[Florian Müllner <fmuellner src gnome org>]

commit 3cd93b5a02bd651c5253a89d8f1025f40db2c779
Author: Sam Hewitt <sam snwh org>
Date:   Fri Nov 16 14:05:05 2018 -0500

    theme: Replace corner ripple png assets with css
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/298

 _common.scss | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)
---
diff --git a/_common.scss b/_common.scss
index 06c50d1..8297914 100644
--- a/_common.scss
+++ b/_common.scss
@@ -1142,17 +1142,16 @@ StScrollBar {
     & > StIcon { icon-size: 16px; }
   }
 
-//Activities Ripples
+// Activities Ripples
 .ripple-box {
   width: 52px;
   height: 52px;
-  background-image: url("resource:///org/gnome/shell/theme/corner-ripple-ltr.png");
-  background-size: contain;
+  border-radius: 0 0 52px 0; // radius the size of the box give us the curve
+  background-color: lighten(transparentize($selected_bg_color, 0.7), 40%);
+  box-shadow: 0 0 2px 2px lighten($selected_bg_color, 20%);
 }
 
-.ripple-box:rtl {
-  background-image: url("resource:///org/gnome/shell/theme/corner-ripple-rtl.png");
-}
+.ripple-box:rtl { border-radius: 0 0 0 52px; } // just a simple change to the border radius position
 
 // not really top bar only
 .popup-menu-arrow { width: 16px; height: 16px; }