N9: Fix an issue when text input sometimes goes under VKB

In landscape mode it already happens with the second line of text. In
portrait you need to enter several lines. Pretty close to similar bug on
Symbian (see #32 - Text input is covered by VKB in landscape mode).
BB10: Add TAOT to share targets for selected text

It's now possible to select a text in any app, press "Share" icon and
select TAO Translator from the list of targets. The text will then be
translated in TAO Translator.
BB10: Ability to share translation
Use translator comments instead of / along with context
BB10: Make language dropdowns full width when expanded