style: add a gap for event dragging

[GVodyanov]

Fix #6424

Before	After

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 22.91%. Comparing base (0fb2f7a) to head (4cf192d).
Report is 54 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #6775      +/-   ##
============================================
- Coverage     23.01%   22.91%   -0.10%     
  Complexity      476      476              
============================================
  Files           252      252              
  Lines         12216    12287      +71     
  Branches       2353     2369      +16     
============================================
+ Hits           2811     2816       +5     
- Misses         9066     9127      +61     
- Partials        339      344       +5     

Flag	Coverage Δ
javascript	14.56% <ø> (-0.06%)	⬇️
php	59.33% <ø> (ø)

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[ChristophWurst]

Let's have the gap only on the right. That seems to be the standard in Gnome Evolution, Google Calendar and Outlook.

[ChristophWurst]

Noice

Just to not confuse the release automation: please change the commit message from type style to fix. Style is meant for coding style changes only.

The release automation will otherwise hide this change from the changelog.

Ref https://github.com/angular/angular/blob/22b96b9/CONTRIBUTING.md#type

[ChristophWurst]

🏓 @GVodyanov this seems ready except for the conventional commit message

[ChristophWurst]

/backport to stable5.2