Enables extensions marked to overide version check to be removed. (#11510)

* Enables extensions marked to overide version check to be removed. (Closes #11506)

Enables extensions marked to overide version check has a '!' in front of
their name. Whereas applets and desklets can be removed, extensions
cannot.

* Removes exclamation mark only from beginning of UID.

To reduce the risk of sideeffects, only remove the exclamation mark at
the left-hand side of the applet/extension/desklet's UID.

Author: sphh

files/usr/share/cinnamon/cinnamon-settings/bin/Spices.py

@@ -784,11 +784,11 @@ def disable_extension(self, uuid):
         new_list = []
         for enabled_extension in enabled_extensions:
             if self.collection_type == 'applet':
-                enabled_uuid = enabled_extension.split(':')[3].strip('!')
+                enabled_uuid = enabled_extension.split(':')[3].lstrip('!')
             elif self.collection_type == 'desklet':
-                enabled_uuid = enabled_extension.split(':')[0].strip('!')
+                enabled_uuid = enabled_extension.split(':')[0].lstrip('!')
             else:
-                enabled_uuid = enabled_extension
+                enabled_uuid = enabled_extension.lstrip('!')
 
             if enabled_uuid != uuid:
                 new_list.append(enabled_extension)