Splitview - Auto-translation should translate as little as possible to ensure visibility of the cursor

When using "splitview" (virtual keyboard with non-fullscreen editing mode), it is now auto-translating the
cursor to the center of the screen if possible.

It would be preferable, if the translation would only be minimal - so that cursor is visible. This makes scrolling
of input widget (i.e. large editor) easier to use, as text flows naturally (row-by-row) and not in "jumps" like it used to do.

Additionally, limit the translation to the end of input widget boundary.