Revert "remove unnessary manual focussing of composer"

This reverts commit 57abbc4273.

src/cryptodevices.js

@@ -64,6 +64,10 @@ export async function getUnknownDevicesForRoom(matrixClient, room) {
     return unknownDevices;
 }
 
+function focusComposer() {
+    dis.dispatch({action: 'focus_composer'});
+}
+
 /**
  * Show the UnknownDeviceDialog for a given room. The dialog will inform the user
  * that messages they sent to this room have not been sent due to unknown devices
@@ -85,6 +89,7 @@ export function showUnknownDeviceDialogForMessages(matrixClient, room) {
             sendAnywayLabel: _t("Send anyway"),
             sendLabel: _t("Send"),
             onSend: onSendClicked,
+            onFinished: focusComposer,
         }, 'mx_Dialog_unknownDevice');
     });
 }