fix Vue warnings for missing element
fix Vue warnings for missing element

LUMC/gitlabhq,t-zuehlsdorff/gitlabhq,mmkassem/gitlabhq,dplarson/gitlabhq,LUMC/gitlabhq,dreampet/gitlab,jirutka/gitlabhq,LUMC/gitlabhq,t-zuehlsdorff/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,htve/GitlabForChinese,mmkassem/gitlabhq,openwide-java/gitlabhq,htve/GitlabForChinese,iiet/iiet-git,dreampet/gitlab,LUMC/gitlabhq,mmkassem/gitlabhq,jirutka/gitlabhq,jirutka/gitlabhq,openwide-java/gitlabhq,htve/GitlabForChinese,jirutka/gitlabhq,dplarson/gitlabhq,t-zuehlsdorff/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,iiet/iiet-git,iiet/iiet-git,openwide-java/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,t-zuehlsdorff/gitlabhq,openwide-java/gitlabhq,stoplightio/gitlabhq,darkrasid/gitlabhq,axilleas/gitlabhq,dplarson/gitlabhq,htve/GitlabForChinese,iiet/iiet-git,dplarson/gitlabhq,axilleas/gitlabhq,darkrasid/gitlabhq,axilleas/gitlabhq