Make word replacement more user friendly

[martonmiklos]

I have came across a valid concern on TJC:
https://talk.maemo.org/showpost.php?p=1542639&postcount=2

If I place the cursor on a word that is already typed and decides to replace it with one of the suggested words by presage, the new word gets inserted where the cursor is rather than replacing the existing word. I recall that was the same behaviour in Jolla C with xt9 as well. Could that be fixed?

Expected/desired behaviour is, when the cursor is placed on an already typed word and one of the suggested words is selected, the existing word gets replaced completely with the suggested word.

@ljo mentioned that it is on his TODO list, I just wanted bring it here as well because if someone came across the similar problem and want to add an issue should see that we are aware of this.