reload terminal when styel block is unmounted and mounted

src/app/common/elements/termstyleblock.tsx

@@ -35,10 +35,20 @@ class TermStyleBlock extends React.Component<{
     themeName: string;
     selector: string;
 }> {
-    componentDidUpdate(): void {
+    componentDidMount() {
         GlobalModel.bumpTermRenderVersion();
     }
 
+    componentWillUnmount() {
+        GlobalModel.bumpTermRenderVersion();
+    }
+
+    componentDidUpdate(prevProps) {
+        if (prevProps.themeName !== this.props.themeName || prevProps.selector !== this.props.selector) {
+            GlobalModel.bumpTermRenderVersion();
+        }
+    }
+
     isValidCSSColor(color) {
         const element = document.createElement("div");
         element.style.color = color;