Fix/enhancements - Githubissues

Several enhancements & fixes required by @kelukelu:

[x] fix: Mobile Download app button wasn't displayer at precisely 1023px
[x] feat: better navigation in viewer component with hover state
[x] fix: Used shared styles from UI in selection bar
[x] fix: toolbar on timeline showed wrong actions
[x] feat: upgrade loading component so it can change its color
[x] feat: update layout so scrolling fits well with no extra padding
[x] fix: albumPhotos layout
[x] Fix: Timeline justified layout (ping especially @goldoraf & @gregorylegarec on this one -> https://github.com/GoOz/cozy-photos-v3/commit/e984c8963a264a017f8b35f2d92f13bec4c16e7e )
[x] fix: add2album modal style
[x] fix: edit album's input was too big
[x] fix: error component style

⚠️ wait for a release of Cozy-UI

cozy / cozy-photos-v3