[iExec Explorer][Feature request] Claim all tasks functionality

[SDxKeeper]

Today I had to claim 34 tasks manually... Thanks to My activity it was not very difficult to find them all, but filters by tasks state would help. After finding all tasks in STARTED state which were started by me, I had 34 tabs where I had to manually click on claim and confirm transaction via metamask.

It's not first time I do these kind of stuff, that is why I wanted to request functionality which will automate claiming all possible tasks with one button (probably with confirming multiple transactions via metamask, if there are no batch support).