Addressed bug: 3058217 "-" key not working at beginning of line

Also fixed related issues below:
* Punc suggestions list was sometimes not displayed after cursor move which follows re-correction
* Punc suggestions list was disappearing with words which contains certain punc chars (but not word separator) such as ' and -

Change-Id: I36faf679321782fa8eaf318411308a4a6b89cc25