Add file sharing function
Merge branch 'hotfix' of https://github.com/comiscienceknight/MetroExplorer into hotfix
check events
Implement copy & paste by using Share
Merge branch 'hotfix' of https://github.com/comiscienceknight/MetroExplorer into hotfix
Remove PageTest
Bug: Correct the duplicated contents in Shared Panel after the second copy.