Make cropping easier

[kmnhan]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 81.81818% with 20 lines in your changes missing coverage. Please review.

Project coverage is 83.88%. Comparing base (58eac3c) to head (9b9e4a7).
Report is 9 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/erlab/interactive/imagetool/dialogs.py	81.13%	10 Missing ⚠️
src/erlab/interactive/explorer.py	75.75%	8 Missing ⚠️
src/erlab/io/plugins/da30.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #95      +/-   ##
==========================================
+ Coverage   83.67%   83.88%   +0.21%     
==========================================
  Files          82       82              
  Lines       14278    14360      +82     
==========================================
+ Hits        11947    12046      +99     
+ Misses       2331     2314      -17     

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