[Feature Request] Multiple Upload from share menu

Hey Guys!

My idea was to upload multiple files/photos (e.g. from QuickPic, or Explorer). Currently Seafile only shows up in the share-menu, when i just select one file. I have managed it to change the code, that i can upload multiple ones.

I'll hope it'll be merged with the original, and then updated the application in the play store.

Best regards!