Collapse days onto a single line if they fit

[SmilyOrg]

By "grouped by date" you mean that it creates too many new lines with only a few photos per line? Or that you'd expect a different order, for example alphabetical?

Yea I wish they fill the screen, PiGallery2 actually is the best in this

Originally posted by @evrial in #100 (comment)

[SmilyOrg]

Flex layout in #108 somewhat addresses this, but it needs some more tweaks to be the default.