recent: improve name of button 'Expand' 'Collapse'

Currently the buttons to expand/collapse all items on the list is simply
named as Expand/Collapse, it is quite(?) ambiguous in English and much
more ambiguous if the translator directly translates it(ex.展開/折疊)
without patching the 'all' meaning on it(ex.全部展開／全部折疊）
Simply patch the source language should be a good idea.

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
Merge pull request #267 from Vdragon/fix_recent_button

recent: improve name of 'Expand' and 'Collapse' buttons

Signed-off-by: David Aguilar <davvid@gmail.com>