fix errors on new tab opening

SublimeBlockCursor.py

@@ -19,9 +19,14 @@ def show_block_cursor(self, view):
             view.erase_regions('SublimeBlockCursorListener')
 
     def on_selection_modified(self, view):
-        if view.settings().get('is_widget') or not("Vintage" in view.settings().get('ignored_packages') or view.settings().get('command_mode')):
+        is_widget = view.settings().get('is_widget')
+        is_vintage_mode = "Vintage" not in view.settings().get('ignored_packages', [])
+        command_mode = view.settings().get('command_mode')
+
+        if is_widget or (is_vintage_mode and not command_mode):
             view.erase_regions('SublimeBlockCursorListener')
             return
+
         self.show_block_cursor(view)
 
     def on_deactivated(self, view):
@@ -35,4 +40,4 @@ def on_activated(self, view):
         self.current_view = view
 
     def on_command_mode_change(self):
-        self.on_selection_modified(self.current_view)
+        self.on_selection_modified(self.current_view)