Add plots_ui.c that contain ui part of plots.
Do not merge it to master branch please.
Code require few changes, that happen in next commits.
It can be merged to some additional branch (like devs/deepwarrior/plots_refactoring)
I like that.
Please fix my remarks and this commit will be ready to be pushed to the repo.
Each public function should be documented.
Public function name shouldn't begin with '_' symbol
what about that code?
This is a too old patch, nobody keeps tracking on this anymore.