Implemented -zen-window-transform-origin attribute and applied it to the panels on the right side

src/servo/components/style/properties/longhands/ui-mako-rs.patch

@@ -0,0 +1,23 @@
+diff --git a/servo/components/style/properties/longhands/ui.mako.rs b/servo/components/style/properties/longhands/ui.mako.rs
+index b7d24fe7bb54b1c143876e3bc9da59c64324ffa5..c36f7edcf076e31209e847af0b59361033d3b4da 100644
+--- a/servo/components/style/properties/longhands/ui.mako.rs
++++ b/servo/components/style/properties/longhands/ui.mako.rs
+@@ -286,6 +286,18 @@ ${helpers.predefined_type(
+     affects="",
+ )}
+ 
++${helpers.predefined_type(
++    "-zen-window-transform-origin",
++    "TransformOrigin",
++    "computed::TransformOrigin::initial_value()",
++    engines="gecko",
++    gecko_ffi_name="mWindowTransformOrigin",
++    boxed=True,
++    spec="None (Nonstandard internal property)",
++    enabled_in="chrome",
++    affects="overflow",
++)}
++
+ ${helpers.predefined_type(
+     "animation-fill-mode",
+     "AnimationFillMode",