drop zone, and remove beta tag from mraid checker

src/tools/sendToMobile.ts

@@ -421,6 +421,7 @@ ${getToolWebviewStyles()}
     selectedPage = 0;
     renderSelection();
     statusEl.textContent = '';
+    statusEl.classList.remove('is-busy');
   });
 
   startBtn.addEventListener('click', () => {
@@ -432,6 +433,7 @@ ${getToolWebviewStyles()}
     }
     startBtn.disabled = true;
     statusEl.textContent = 'Starting server...';
+    statusEl.classList.add('is-busy');
     vscode.postMessage({ type: 'startShare', paths: selectedPaths });
   });
 
@@ -548,6 +550,7 @@ ${getToolWebviewStyles()}
       selectedPage = 0;
       renderSelection();
     } else if (m.type === 'sharing') {
+      statusEl.classList.remove('is-busy');
       currentUrls = m.urls;
       selectedIdx = 0;
       statusEl.innerHTML = '<span class="ok">Sharing: ' + m.filename + '</span>';
@@ -558,6 +561,7 @@ ${getToolWebviewStyles()}
       startBtn.disabled = true;
       stopBtn.disabled = false;
     } else if (m.type === 'stopped') {
+      statusEl.classList.remove('is-busy');
       statusEl.textContent = 'Stopped.';
       shareInfo.style.display = 'none';
       ifaceWrap.style.display = 'none';
@@ -566,6 +570,7 @@ ${getToolWebviewStyles()}
       startBtn.disabled = false;
       stopBtn.disabled = true;
     } else if (m.type === 'error') {
+      statusEl.classList.remove('is-busy');
       statusEl.innerHTML = '<span class="err">' + (m.message || 'Error').replace(/</g, '&lt;') + '</span>';
       startBtn.disabled = false;
     }