feat: Added pref for context menu refresh, b=no-bug, c=common, tabs

prefs/view.yaml

@@ -51,3 +51,6 @@
 
 - name: zen.view.drag-and-drop.drop-inside-lower-threshold
   value: 30
+
+- name: zen.view.context-menu.refresh
+  value: false

src/zen/common/ZenUIManager.mjs

@@ -78,6 +78,9 @@ var gZenUIManager = {
   },
 
   _debloatContextMenus() {
+    if (!Services.prefs.getBoolPref('zen.view.context-menu.refresh', false)) {
+      return;
+    }
     const contextMenusToClean = [
       // Remove the 'new tab below' context menu.
       // reason: It doesn't properly work with zen and it's philosophy of not having

src/zen/tabs/ZenPinnedTabManager.mjs

@@ -805,6 +805,10 @@
             if (selectedTab.group?.hasAttribute('split-view-group')) {
               tabsToUnload = selectedTab.group.tabs;
             }
+            const allAreUnloaded = tabsToUnload.every((tab) => tab.hasAttribute('pending'));
+            if (allAreUnloaded) {
+              return await this._onCloseTabShortcut(event, selectedTab, { behavior: 'close' });
+            }
             await gBrowser.explicitUnloadTabs(tabsToUnload);
             selectedTab.removeAttribute('discarded');
           }

surfer.json

@@ -19,7 +19,7 @@
       "brandShortName": "Zen",
       "brandFullName": "Zen Browser",
       "release": {
-        "displayVersion": "1.15.2b",
+        "displayVersion": "1.15.3b",
         "github": {
           "repo": "zen-browser/desktop"
         },