add tootip for merge worker
add tootip for merge worker

doortts/fork-yobi,Limseunghwan/oss,ahb0327/yobi,doortts/forked-for-history,bloodybear/yona,ChangsungKim/TestRepository01,naver/yobi,yona-projects/yona,naver/yobi,brainagenet/yobi,doortts/fork-yobi,Limseunghwan/oss,yona-projects/yona,violetag/demo,oolso/yobi,oolso/yobi,doortts/forked-for-history,Limseunghwan/oss,brainagenet/yobi,ahb0327/yobi,ChangsungKim/TestRepository01,bloodybear/yona,ihoneymon/yobi,bloodybear/yona,oolso/yobi,violetag/demo,ihoneymon/yobi,ihoneymon/yobi,yona-projects/yona,doortts/forked-for-history,bloodybear/yona,doortts/fork-yobi,ahb0327/yobi,naver/yobi,doortts/fork-yobi,yona-projects/yona,brainagenet/yobi