Add tooltips for common Event feed entries
Add tooltips for common Event feed entries

This adds tooltips to the event target for events like "opened merge
request !XYZ"

screenpages/gitlabhq,mr-dxdy/gitlabhq,allysonbarros/gitlabhq,dreampet/gitlab,dreampet/gitlab,darkrasid/gitlabhq,jirutka/gitlabhq,stoplightio/gitlabhq,axilleas/gitlabhq,mmkassem/gitlabhq,LUMC/gitlabhq,t-zuehlsdorff/gitlabhq,SVArago/gitlabhq,stoplightio/gitlabhq,openwide-java/gitlabhq,iiet/iiet-git,dplarson/gitlabhq,LUMC/gitlabhq,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,daiyu/gitlab-zh,mmkassem/gitlabhq,mr-dxdy/gitlabhq,jirutka/gitlabhq,shinexiao/gitlabhq,darkrasid/gitlabhq,htve/GitlabForChinese,Soullivaneuh/gitlabhq,dreampet/gitlab,axilleas/gitlabhq,icedwater/gitlabhq,dplarson/gitlabhq,shinexiao/gitlabhq,daiyu/gitlab-zh,daiyu/gitlab-zh,daiyu/gitlab-zh,dreampet/gitlab,mmkassem/gitlabhq,martijnvermaat/gitlabhq,dplarson/gitlabhq,iiet/iiet-git,allysonbarros/gitlabhq,mmkassem/gitlabhq,t-zuehlsdorff/gitlabhq,iiet/iiet-git,openwide-java/gitlabhq,shinexiao/gitlabhq,icedwater/gitlabhq,martijnvermaat/gitlabhq,jirutka/gitlabhq,LUMC/gitlabhq,mr-dxdy/gitlabhq,openwide-java/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,Soullivaneuh/gitlabhq,allysonbarros/gitlabhq,icedwater/gitlabhq,screenpages/gitlabhq,SVArago/gitlabhq,Soullivaneuh/gitlabhq,t-zuehlsdorff/gitlabhq,darkrasid/gitlabhq,screenpages/gitlabhq,openwide-java/gitlabhq,stoplightio/gitlabhq,LUMC/gitlabhq,martijnvermaat/gitlabhq,allysonbarros/gitlabhq,htve/GitlabForChinese,htve/GitlabForChinese,Soullivaneuh/gitlabhq,iiet/iiet-git,dplarson/gitlabhq,darkrasid/gitlabhq,screenpages/gitlabhq,jirutka/gitlabhq,SVArago/gitlabhq,martijnvermaat/gitlabhq,shinexiao/gitlabhq,mr-dxdy/gitlabhq,icedwater/gitlabhq,htve/GitlabForChinese,SVArago/gitlabhq