feat: Added pref for wheel closing an unloaded pinned tab, b=no-bug, c=workspaces, tabs

prefs/workspaces.yaml

@@ -36,6 +36,9 @@
   value: '@cond'
   condition: '!defined(MOZILLA_OFFICIAL)' # Section: Pinned tabs management
 
+- name: zen.pinned-tab-manager.wheel-close-if-pending
+  value: true
+
 - name: zen.pinned-tab-manager.debug
   value: false
 

src/zen/tabs/ZenPinnedTabManager.mjs

@@ -615,7 +615,11 @@
     async _onTabClick(e) {
       const tab = e.target?.closest('tab');
       if (e.button === 1 && tab) {
-        await this._onCloseTabShortcut(e, tab, { closeIfPending: true });
+        await this._onCloseTabShortcut(e, tab, {
+          closeIfPending: Services.prefs.getBoolPref(
+            'zen.pinned-tab-manager.wheel-close-if-pending'
+          ),
+        });
       }
     }