Remove all claims in wbeditentity when clear=true is set

Bug: 67791
Change-Id: I4ea245043b19484e6a9c4334081431fd29524fc3
(cherry picked from commit 77cbdec66a41d9b2eb61c34a369b5b1598ffb69a)
Fix sitelinks table layout for FF

Bug: 67730
Change-Id: I0925b59a590454472bfcb152404a66fbd4eecbe6
(cherry picked from commit 1d05883d8d980fcf8a00b3f6752916cb0803c265)
Merge "Remove all claims in wbeditentity when clear=true is set" into mw1.24-wmf12