Fix View Once Video, fix Permissions Popup

* Ensure we're ready to handle incoming View Once messages
* Ensure that permissions popup initializes fully

js/models/messages.js

@@ -892,7 +892,10 @@
       }
 
       const firstAttachment = attachments[0];
-      if (!GoogleChrome.isImageTypeSupported(firstAttachment.contentType)) {
+      if (
+        !GoogleChrome.isImageTypeSupported(firstAttachment.contentType) &&
+        !GoogleChrome.isVideoTypeSupported(firstAttachment.contentType)
+      ) {
         return false;
       }
 
@@ -976,6 +979,7 @@
         sticker: null,
         preview: [],
       });
+      this.trigger('content-changed');
 
       await window.Signal.Data.saveMessage(this.attributes, {
         Message: Whisper.Message,