Use Popover for the magnets/links

Deprecating the AddMagnetDialog.

If you have a link in your clipboard, you can double click the add magnet window to quickly add you'r magnet/links.
Thx prince for the idea.
Fix UI lags.

On removing a torrent, a torrent that would be above the removed torrent would change name for up to one second.
Also, the infobar would not update unless triggered by a click and would keep showing info about a deleted torrent.
Uses GTK 3.12 (hopefully)
Uses GTK 3.12 (this time for good)
like a bloody storm, atsuku like a bloody stone
Shinpai nain da ze oh my friend
>mfw ᶘ ᵒᴥᵒᶅ
>mfw (╯°□°）╯︵ ┻━┻
Merge branch 'master' into wip/ui-fixes
wider magnet link box and update core submodule
added some (reasonable) default column widths
Maware Maware Maware Maware Maware
Dou datte iu nda
It better be below 50 MB...
Nan no tame

Ikkiteruno
Make it, OhOh
I don't want to touch this any more.

And I'm sure this shit is still gonna be over 50megs
Hara hetta
Come on faggot
Probably last time.