The date format `%Y%m%d%H%M` will successfully match against
one-digit month, day, hour, and minute strings, even though %m et al.
are documented as being zero-padded. So dates without time in
Nov/Dec may be wrongly parsed as dates in January with time.
This commit adds a format string of `%Y%m%d` to our supported date
format strings directly below (higher priority) its problematic relatives.
Closes#2076
Authored by: wlritchi
We already had a few copies of Polymer-style pagination handling logic
for certain circumstances, but now we're forced into using it for all
playlists since we can no longer disable Polymer. Refactor the logic to
move it to the parent class for all entry lists (including e.g. search
results, feeds, and list of playlists), and generify a bit to cover the
child classes' use cases.