enable save of attachments on click on single generic attachment

ts/components/conversation/Message.tsx

@@ -473,7 +473,16 @@ export class Message extends React.PureComponent<Props, State> {
             </div>
           ) : (
             <div className="module-message__generic-attachment__icon-container">
-              <div className="module-message__generic-attachment__icon">
+              <div
+                role="button"
+                className="module-message__generic-attachment__icon"
+                onClick={(e: any) => {
+                  if (this.props?.onDownload) {
+                    e.stopPropagation();
+                    this.props.onDownload(firstAttachment);
+                  }
+                }}
+              >
                 {extension ? (
                   <div className="module-message__generic-attachment__icon__extension">
                     {extension}

ts/components/session/conversation/SessionCompositionBox.tsx

@@ -455,7 +455,7 @@ export class SessionCompositionBox extends React.Component<Props, State> {
     if (!conversationModel) {
       return;
     }
-    const allPubKeys = conversationModel.get('members') as Array<string>;
+    const allPubKeys = conversationModel.get('members');
 
     const allMembers = allPubKeys.map(pubKey => {
       const conv = window.ConversationController.get(pubKey);