Some stuff.

... It is edge tool and I do not know how it can work but in Multi Selction mode it does not work, is it how it should be?

I don't understand what you mean.

Hay, IStonia everything is ok, 2 is done!

http://www.digitalfossils.com/Download/NVil-Jun-15-16.rar
Check 3.

Done!

http://www.digitalfossils.com/Download/NVil-Jun-15-16.rar

4. View > Object Shading > Preview On View Navigating > Show Mesh On Preview. It only works in active viewport.

It only works in active viewport.

What do you mean?

In Preview if object is selected it does not hide eges:


Have to look like this:

Looks like I misunderstand your this request. Can you make a video and send me your config?

Sec!

My Idea is - to work in Wireframe mod and be able to preview object! Because when you work in wireframe mode it is very hard to guess how object looks like in real life.

Config sent!
This is vide:
http://take.ms/SoVtI

http://www.digitalfossils.com/Download/NVil-Jun-15-16.rar

Working good, thanks!

6. If you set hotkey of SL tool to ALt+.. or Ctrl+.. or Shift+.. and then you Click+ One of these modifiers SL tool will be dropped.

Can you explain in a video?

Check it:
http://take.ms/Wxfy3

http://www.digitalfossils.com/Download/NVil-Jun-15-16.rar

Also check 5.

Everything is good!
If it will not take a lot of time, add please this feature also to Slide too.