Set Cursor Blink via menu in QTerminal

[abm-1980]

Is your feature request related to a problem? Please describe.
In the current and previous release of LXQt, there's no menu in QTerminal to enable cursor blink
and so I have to edit the .bashrc file and add another line to make the cursor blink.

Describe the solution you'd like
Additional menu in QTerminal to enable cursor blink.

Describe eventual alternatives you've considered
The only way to enable the feature stated above is to manually edit the .bashrc
and add another line with:

echo -e -n "\e[0 q"

Context

This issue however is not very serious but, it would be nice to include such feature mentioned
as it would be more convenient to modify settings via menu instead of manual editing of configuration file.

[stefonarch]

It was on the way: #698 PR abandoned