[WEB] 已讀/未讀列表中，若有兩個以上的使用者等級為0，列表顯示為空白

[QA]

Version: mmweb_v1.3.0-alpha+201703011713.tgz

Description: 已讀/未讀列表中，若有兩個以上的使用者等級為0，列表顯示為空白

[arthur chu]

[Summary] fix read/unread list would be empty [Type] fix [Scope] web, app [Bug] resolve #474 [Phenomemon]

[Reason] multiple users in read/unread list would be emtply [Changes] filter out user whichc is undefined in read/unread list [Announcement] [WEB][錯誤修正] 已讀/未讀列表中，若有兩個以上的使用者等級為0，列表顯示為空白

→ <<cset dcdefcc67672>>

[Ya-Ting Hsu]

Merged in feature_msg_unread (pull request #57)

[Summary] fix read/unread list would be empty [Type] fix [Scope] web, app [Bug] resolve #474 [Phenomemon]

→ <<cset 8fa7eb644fcd>>

[QA]

Verified on mmweb_v1.4.1-beta+201704201140.tgz

等級為 0 的使用者會排除於已讀/未讀列表中