Show loading indicator for autocomplete
Show loading indicator for autocomplete

Closes #15435

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