comment draft lags when defocusing tab

- open a comment
- type some stuff into it
- click the gitcasso popup
- BUG: the draft is not there
- close the popup and open it again
- now the draft is there.

The sequence of events is:

- open popup
- popup sends `GET_OPEN_SPOTS` to background
- background replies with `GetTableRowsResponse`
- because popup has focus, the tab lost focus
- tab notices and sends `LOST_FOCUS` event with updated draft
- but the rows were already sent

Workaround: if you defocus the text area manually by clicking somewhere else in the tab, and then click the popup, then the popup is up-to-date right away.

重現 issue 中描述的 popup 序列，然後追蹤 popup 與 background 針對 GET_OPEN_SPOTS 的交換，以及攜帶更新後草稿的分頁 LOST_FOCUS 事件。檢查對 GetTableRowsResponse 和焦點變更的處理；重新開啟或開啟 popup 後能立即顯示最新的留言草稿即表示完成。

由索引模型根據 Issue 內容生成。