Re-render tab when it's disabled state changes.

gui/chrome_tabs.py

@@ -367,7 +367,7 @@ class _TabRenderer:
         width = max(width, self.min_width)
         height = max(height, self.min_height)
 
-        self.disabled = False
+        self._disabled = False
         self.baseText = text
         self.extraText = ''
         self.tab_size = (width, height)
@@ -383,6 +383,18 @@ class _TabRenderer:
         self.position = (0, 0)  # Not used internally for rendering - helper for tab container
         self.InitTab()
 
+    @property
+    def disabled(self):
+        return self._disabled
+
+    @disabled.setter
+    def disabled(self, value):
+        if value == self._disabled:  # Avoid unnecessary re-rendering
+            return
+
+        self._disabled = value
+        self._Render()
+
     @property
     def text(self):
         return self.baseText + self.extraText