Reasons:
- can show or hide the button text with CSS (assuming
tv-config-toolbar-text is yes).
- can have different looking buttons in the page controls versus the
view toolbar, etc
- more flexibility styling the button appearance, for example you
can change the text size compared to the icon size
- button appearance is more themeable
Also adds flag icon for each language.
One limitation is that the language button doesn’t work properly when
accessed via the “more” menu of the page controls.
@BramChen - could you help me choose the most appropriate flags to use
for the variants of Chinese?
