Fix combobox popup menu

[kunitoki]

This pull request introduces improvements to the ComboBox widget's popup menu interaction logic and enhances the text layout behavior in the Label widget. The main focus is on preventing the popup menu from immediately reopening after dismissal due to a mouse click, ensuring a smoother user experience. Additionally, the pull request includes a test to verify the new popup behavior and refines how text is rendered in labels to better fit available space.

ComboBox popup interaction improvements

• Added logic in ComboBox to prevent the popup menu from reopening immediately after it is dismissed by a mouse click, using new state flags (ignoreMouseDownAfterPopupDismissal, dismissingPopupFromMouseDown) and handling within mouseDown and showPopup methods. [1] [2] [3]
• Added a unit test PopupDismissalClickDoesNotReopenPopup to verify that a click used to dismiss the popup does not immediately reopen it, ensuring correct behavior.

Label text layout improvements

• Updated the Label::prepareText method to use the provided font or fallback to the default, and to dynamically adjust the font size so that text fits within the available width, preventing overflow and improving appearance. Also changed text overflow handling from ellipsis to visible.

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.61%. Comparing base (b0e166d) to head (9d9bbc1).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
modules/yup_gui/widgets/yup_ComboBox.cpp	84.61%	2 Missing ⚠️
modules/yup_gui/widgets/yup_Label.cpp	90.90%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #114      +/-   ##
==========================================
+ Coverage   78.50%   78.61%   +0.11%     
==========================================
  Files         605      605              
  Lines       60548    60566      +18     
==========================================
+ Hits        47531    47614      +83     
+ Misses      13017    12952      -65     

Files with missing lines	Coverage Δ
modules/yup_gui/widgets/yup_ComboBox.h	80.00% <ø> (ø)
modules/yup_gui/widgets/yup_Label.cpp	86.88% <90.90%> (+1.17%)	⬆️
modules/yup_gui/widgets/yup_ComboBox.cpp	89.70% <84.61%> (+14.90%)	⬆️

... and 13 files with indirect coverage changes

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