Fix filepicker styling

[icewind1991]

Fixes#2252

Also now limits the filepicker size to fit in small screens.

cc @jancborchardt@LukasReschke

[mention-bot]

@icewind1991, thanks for your PR! By analyzing the history of the files in this pull request, we identified @tanghus, @PVince81 and @jancborchardt to be potential reviewers.

[MorrisJobke]

Really nice. There is only one issue:

• cause a file conflict dialog and then resize the window: the modal is always increasing size and can't be closed anymore, because the elements are out of the view

[MorrisJobke]

Potentially also fixes #1864

[icewind1991]

cause a file conflict dialog and then resize the window: the modal is always increasing size and can't be closed anymore, because the elements are out of the view

Fixed

[MorrisJobke]

Tested and works 👍

[MorrisJobke]

Tested and works 👍

Chrome, Safari, IE11 and Edge ;)

[LukasReschke]

LGTM

[codecov-io]

Current coverage is 57.03% (diff: 0.00%)

Merging #2342 into master will decrease coverage by 0.03%

@@ master #2342 diff @@
==========================================
Files 1191 1191 Lines 71911 72140 +229 Methods 7299 7335 +36 Messages 0 0 Branches 1213 1226 +13 ==========================================
+ Hits 41036 41142 +106 - Misses 30875 30998 +123 
Partials 0 0 

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