Allow eboard to change what directorship a meeting is

Right now if someone accidentally submits the wrong directorship for a meeting they either have to resubmit or ask an rtp to change it, which isn't ideal. It would be cool if they could change what kind of meeting it is in the same place that they can edit attendance (i think this is a thing guys i'm not on eboard i wouldn't know)

該 issue 沒有指出任何檔案、測試或進入點。首先找出 eboard 會議出席情況的編輯流程，並確認會議主持權在哪裡顯示及儲存。完成的標準是，eboard 使用者可以在與出席情況相同的位置變更會議主持權，而不必重新提交或請求 RTP 變更。

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