Add the ability to scroll on the workspace indicator and icons container.

src/zen/workspaces/ZenWorkspaces.mjs

@@ -467,6 +467,17 @@ var gZenWorkspaces = new (class extends ZenMultiWindowFeature {
             workspaceWrapper.pinnedTabsContainer,
             tabs
           );
+          this.initIndicatorContextMenu(workspaceWrapper.indicator);
+          workspaceWrapper.indicator.addEventListener('wheel', (event) => {
+            const isTrackpad =
+              (event.wheelDeltaY && event.wheelDeltaY === event.deltaY * -3) ||
+              event.deltaMode === 0;
+
+            const verticalScroll = Math.abs(event.deltaY) > Math.abs(event.deltaX);
+            if ((isTrackpad && verticalScroll) || !isTrackpad) {
+              this.scrollInDirection(event.deltaY);
+            }
+          });
           resolve();
         },
         { once: true }
@@ -549,6 +560,14 @@ var gZenWorkspaces = new (class extends ZenMultiWindowFeature {
     });
   }
 
+  scrollInDirection(delta) {
+    // Determine scroll direction
+    const rawDirection = delta > 0 ? 1 : -1;
+
+    const direction = this.naturalScroll ? -1 : 1;
+    this.changeWorkspaceShortcut(rawDirection * direction);
+  }
+
   _setupSidebarHandlers() {
     const toolbox = gNavToolbox;
 
@@ -590,11 +609,7 @@ var gZenWorkspaces = new (class extends ZenMultiWindowFeature {
         const delta = isVerticalScroll ? event.deltaY : event.deltaX;
         if (Math.abs(delta) < scrollThreshold) return;
 
-        // Determine scroll direction
-        let rawDirection = delta > 0 ? 1 : -1;
-
-        let direction = this.naturalScroll ? -1 : 1;
-        this.changeWorkspaceShortcut(rawDirection * direction);
+        this.scrollInDirection(delta);
 
         this._lastScrollTime = currentTime;
       },