chore: Bump version and add pref for hiding the throbber, b=no-bug, c=tabs

prefs/theme.yaml

@@ -29,6 +29,9 @@
 - name: zen.theme.use-sysyem-colors
   value: false
 
+- name: zen.theme.hide-tab-throbber
+  value: true
+
 # ==== Mark: border radius ====
 
 # macOS border radius

src/zen/tabs/zen-tabs/vertical-tabs.css

@@ -1502,10 +1502,11 @@
   opacity: 0.7;
 }
 
-.tab-throbber {
-  display: none !important; /* Hide throbber always */
-}
-
-.tab-icon-image {
-  display: flex !important;
+@media (-moz-pref('zen.theme.hide-tab-throbber')) {
+  .tab-throbber {
+    display: none !important;
+  }
+  .tab-icon-image {
+    display: flex !important;
+  }
 }

surfer.json

@@ -19,7 +19,7 @@
       "brandShortName": "Zen",
       "brandFullName": "Zen Browser",
       "release": {
-        "displayVersion": "1.14.10b",
+        "displayVersion": "1.14.11b",
         "github": {
           "repo": "zen-browser/desktop"
         },