fixup! Added logic to process reply to favorite request and update likes counter accordingly. Should fix some of cases of doubled likes and likes counter not decrementing.

explaining what's going on. Fixes favorite button jumping left and right
depending on post visibility

accordingly. Should fix some of cases of doubled likes and likes counter not decrementing.

The locale can now be configured in settings and is stored in
Vuex. The changes are applied immidiately after selection. The list of
languages is taken from the messages file, which contains all the
available locales (and a new value, `interfaceLanguage`, to control
the translation of this option in the options menu)

Closes #36