Remove Focus Ring for Circuit Run Button (#2578)

Author: ScottCarda-MS

source/npm/qsharp/ux/qsharp-circuit.css

@@ -343,6 +343,10 @@
     filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.25));
   }
 
+  .svg-run-button:focus {
+    outline: none;
+  }
+
   .svg-run-button-text {
     fill: var(--vscode-button-foreground, #ffffff);
     font-size: 16px;