Canned message - Extend messages length

[prampec]

See description of PR meshtastic/firmware#1232

Note that protos changes are not part of this commit!

Most of this code changes are made by @mkinney .

[prampec]

Also note, that unit tests are not updated/executed by me.

[mkinney]

Is this PR ok to merge? @prampec

[prampec]

It works well. Changes are mostly done by you. My most notable change is on mesh_interface.py. Please verify that.

Unit tests are not altered by me, so you might also want to take a look on that.

[mkinney]

I just "approved" the work flow. (I must admit that I didn't realize that I needed to do that.)

Can you fix the lint warnings? I think you just need to add "self.Response = None" in the constructor for the most of those warnings. The other warning can be "worked around" by modifying the .pylintrc file "max-module-lines=1200" to something like 1400.

[mkinney]

Also, do you know what commit of the protobufs is needed for this change?

[mkinney]

Well, I'm just going to merge this then do a PR to fix the warnings.

[prampec]

I do not know too much about python, and I don't know how to execute these checks locally (pylnt, pytest, coverage, etc.). Please give me more details on the topic!