IssueList: extend width of .mileston-tag
IssueList: extend width of .mileston-tag

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