Diff editor sync marker by column

[anijanyan]

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Pull Request Checklist:

• No backwards incompatible changes were made to Ace's public interface which is defined through the main typings file (ace.d.ts) and its references:
  • https://github.com/ajaxorg/ace/blob/master/ace.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-modes.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-extensions.d.ts

[codecov]

Codecov Report

Attention: Patch coverage is 95.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 87.46%. Comparing base (63add65) to head (3cadb20).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/ext/diff/base_diff_view.js	80.00%	2 Missing ⚠️
src/ext/diff/diff_view.js	96.96%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5810      +/-   ##
==========================================
+ Coverage   87.45%   87.46%   +0.01%     
==========================================
  Files         611      611              
  Lines       45669    45709      +40     
  Branches     7498     7501       +3     
==========================================
+ Hits        39938    39981      +43     
+ Misses       5731     5728       -3     

Flag	Coverage Δ
unittests	87.46% <95.00%> (+0.01%)	⬆️

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