Adds a trailing space after text if cursor position < text length to
prevent width of the widget changing particularly useful when using
'text' and 'selectall' to do eg. in-place renaming.
Sample textbox content (# space, _ cursor).
Before:
textbox before prompt: #term#
selectall prompt textbox : #_erm <- shorter than other cases
after pressing end : #term_
After:
textbox before prompt: #term#
selectall prompt textbox : #_erm#
after pressing end : #term_
Signed-off-by: koniu <gkusnierz@gmail.com>
4c031ba398