Add setting to toggle open editors section

[MinusGix]

• Added an entry to CHANGELOG.md if this change could be valuable to users

Fixes #2268 and the first half of #3063

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 5.82%. Comparing base (43b54d0) to head (f95c9ba).
Report is 48 commits behind head on master.

Files	Patch %	Lines
lapce-app/src/panel/view.rs	0.00%	9 Missing ⚠️
lapce-app/src/file_explorer/view.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #3095      +/-   ##
=========================================
- Coverage    6.01%   5.82%   -0.20%     
=========================================
  Files         122     120       -2     
  Lines       42703   43293     +590     
=========================================
- Hits         2569    2522      -47     
- Misses      40134   40771     +637     

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