style/launcher/left pane toggle button arrow: fix the transform property being overidden

Author: adoriandoran

apps/client/src/widgets/buttons/left_pane_toggle.css

@@ -1,16 +1,16 @@
 @keyframes left-pane-toggle-button-expand {
     from {
-        transform: rotate(0deg);
+        rotate: 0deg;
     } to {
-        transform: rotate(180deg);
+        rotate: 180deg;
     }
 }
 
 @keyframes left-pane-toggle-button-collapse {
     from {
-        transform: rotate(180deg);
+        rotate: 180deg;
     } to {
-        transform: rotate(360deg);
+        rotate: 360deg;
     }
 }
 
@@ -19,11 +19,11 @@
 }
 
 .layout-vertical .left-pane-toggle-button.action-collapse::before {
-    transform: rotate(360deg);
+    rotate: 360deg;
     animation: left-pane-toggle-button-collapse 600ms ease-in-out;
 }
 
 .layout-vertical .left-pane-toggle-button.action-expand::before {
-    transform: rotate(180deg);
+    rotate: 180deg;
     animation: left-pane-toggle-button-expand 600ms ease-in-out;
 }