Add exit label to keyboard connection screen (#1830)

* Add exit label to keyboard connection screen (resolves #1814)
* BtHid: align baselines on connection screen

Co-authored-by: あく <alleteam@gmail.com>

applications/plugins/bt_hid_app/views/bt_hid_keyboard.c

@@ -209,6 +209,11 @@ static void bt_hid_keyboard_draw_callback(Canvas* canvas, void* context) {
         canvas_draw_icon(canvas, 0, 0, &I_Ble_disconnected_15x15);
         canvas_set_font(canvas, FontPrimary);
         elements_multiline_text_aligned(canvas, 17, 3, AlignLeft, AlignTop, "Keyboard");
+
+        canvas_draw_icon(canvas, 68, 3, &I_Pin_back_arrow_10x8);
+        canvas_set_font(canvas, FontSecondary);
+        elements_multiline_text_aligned(canvas, 127, 4, AlignRight, AlignTop, "Hold to exit");
+
         elements_multiline_text_aligned(
             canvas, 4, 60, AlignLeft, AlignBottom, "Waiting for Connection...");
         return; // Dont render the keyboard if we are not yet connected