New media permission, show dialog when not enabled for voice msg

UI now in separate renderer:
  - the permissions popup
  - settings dialog
  - debug log dialog
  - about window

Couple bug fixes:
  - About Window: Fix 'escape' to close window
  - Remove outdated dist/copy tasks from Gruntfile

Eslintified settings_view.js

js/permissions_popup_start.js

@@ -0,0 +1,19 @@
+$(document).on('keyup', function(e) {
+  if (e.keyCode === 27) {
+    window.closePermissionsPopup();
+  }
+});
+
+const $body = $(document.body);
+
+window.view = new Whisper.ConfirmationDialogView({
+  message: i18n('audioPermissionNeeded'),
+  okText: i18n('allowAccess'),
+  resolve: () => {
+    window.setMediaPermissions(true);
+    window.closePermissionsPopup();
+  },
+  reject: window.closePermissionsPopup,
+});
+
+window.view.$el.appendTo($body);