Add more Refactor* subcommands for python

[mnikulin]

I didn't understand why adding the Refactor Inline would be inconsistent and it seemed to me that using the extract_variable and extract_function without additional arguments is easy to implement exactly like Refactor Rename, and the arguments until_line and until_column are used in visual block mode.

---

This change is 

[puremourning]

@MergifyIO rebase

[mergify[bot]]

rebase

✅ Branch has been successfully rebased

[codecov[bot]]

Codecov Report

Merging #1640 (7e67216) into master (323d4b6) will increase coverage by 0.02%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1640      +/-   ##
==========================================
+ Coverage   96.07%   96.10%   +0.02%     
==========================================
  Files          90       90              
  Lines        8044     8078      +34     
  Branches      164      164              
==========================================
+ Hits         7728     7763      +35     
+ Misses        264      263       -1     
  Partials       52       52              

[mergify[bot]]

Thanks for sending a PR!

[mergify[bot]]

Thanks for sending a PR!