Hide client stability when extension is Off (#171)

Hides connection stability text when the extension is off but the client
is On with an Unstable or NoSignal connection

![Screenshot 2024-12-23
101146](https://github.com/user-attachments/assets/48cd6ae9-b896-44ad-9bd4-421e2535d7cc)

src/components/vpncard.js

@@ -147,6 +147,7 @@ export class VPNCard extends LitElement {
               ${VPNCard.subline(
                 this.enabled,
                 this.stability,
+                this.connecting,
                 this.clientConnected
               )}
               ${timeString}
@@ -203,6 +204,9 @@ export class VPNCard extends LitElement {
       </svg>
     `;
 
+    if (!enabled) {
+      return;
+    }
     switch (stability) {
       case VPNState.NoSignal:
         return html`<p class="subline">${errorSvg} No Signal</p>`;