Add event name dropdown for event markers

[mjansen4857]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 77.94118% with 30 lines in your changes missing coverage. Please review.

Project coverage is 84.09%. Comparing base (361618c) to head (df3726f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...idgets/editor/tree_widgets/event_markers_tree.dart	61.64%	28 Missing ⚠️
lib/pages/home_page.dart	0.00%	1 Missing ⚠️
...or/tree_widgets/commands/named_command_widget.dart	88.88%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #836      +/-   ##
==========================================
- Coverage   84.53%   84.09%   -0.44%     
==========================================
  Files          87       87              
  Lines        8232     8294      +62     
==========================================
+ Hits         6959     6975      +16     
- Misses       1273     1319      +46     

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