gh-14619: Fixed split view drag opening new windows (gh-14621)

src/zen/drag-and-drop/ZenDragAndDrop.js

@@ -898,7 +898,10 @@
 
     handle_windowDragLeave(event) {
       // If relatedTarget exists, then we are still in the window
-      if (event.relatedTarget) {
+      if (
+        event.relatedTarget ||
+        event.target.id === "zen-split-view-fake-browser"
+      ) {
         return;
       }
       const canvas = this._tabbrowserTabs._dndCanvas;

src/zen/spaces/ZenSpaceManager.mjs

@@ -2486,7 +2486,8 @@ class nsZenWorkspaces {
       w => w.uuid !== this.activeWorkspace
     );
     const ctxCommand = document.getElementById("cmd_zenCtxDeleteWorkspace");
-    if (workspaces.length <= 1) {
+    const hasMultipleWorkspaces = !!workspaces.length;
+    if (!hasMultipleWorkspaces) {
       ctxCommand.setAttribute("disabled", "true");
     } else {
       ctxCommand.removeAttribute("disabled");
@@ -2506,6 +2507,9 @@ class nsZenWorkspaces {
       )) {
         item.remove();
       }
+      if (!hasMultipleWorkspaces) {
+        continue;
+      }
       const separator = document.createXULElement("menuseparator");
       separator.classList.add("zen-workspace-context-menu-item");
       if (isMoveTabPopup) {

surfer.json

@@ -20,7 +20,7 @@
       "brandShortName": "Zen",
       "brandFullName": "Zen Browser",
       "release": {
-        "displayVersion": "1.21.7b",
+        "displayVersion": "1.21.8b",
         "github": {
           "repo": "zen-browser/desktop"
         },