feat: Add toggle compact mode to the default placements, b=no-bug, c=common, glance

src/zen/common/ZenCustomizableUI.sys.mjs

@@ -13,7 +13,7 @@ export var ZenCustomizableUI = new (class {
       'zen-sidebar-top-buttons',
       {
         type: this.TYPE_TOOLBAR,
-        defaultPlacements: [],
+        defaultPlacements: ['zen-toggle-compact-mode'],
         defaultCollapsed: null,
         overflowable: true,
       },

src/zen/common/styles/zen-panel-ui.css

@@ -51,6 +51,7 @@ panel[type='arrow']:not(#feature-callout) {
   }
 
   @media (-moz-platform: macos) {
+    border: 0px transparent !important;
     appearance: auto !important;
     -moz-default-appearance: menupopup;
     /* We set the default background here, rather than on ::part(content),
@@ -60,7 +61,6 @@ panel[type='arrow']:not(#feature-callout) {
     --panel-shadow-margin: 0px !important;
     --panel-background: transparent !important;
     --panel-border-color: transparent;
-    border: 0 !important;
 
     &::part(content) {
       background-color: transparent !important;

src/zen/glance/ZenGlanceManager.mjs

@@ -922,7 +922,7 @@
           {
             duration: 0.3,
             easing: 'easeInOut',
-            bounce: 0.1,
+            bounce: 0,
           }
         );
       }