PatternGeneratorApp: missing units labels and 'char' button text

[mbreiser]

Summary

Two minor GUI issues in the PatternGeneratorApp:

1. Missing units labels: Parameters like spatial frequency, pole azimuth, pole elevation, and step size should display units (e.g., degrees) in the GUI labels. Currently, users must know the expected units from documentation.

2. 'char' button text: After selecting an arena type from the dropdown, the dropdown button sometimes displays the text "char" instead of the selected arena name.

Steps to Reproduce

Missing units labels

1. Open PatternGeneratorApp
2. Look at parameter fields (spatial frequency, pole azimuth, pole elevation, step size)
3. Note that no units are displayed next to the input fields

'char' button text

1. Open PatternGeneratorApp
2. Select an arena type from the dropdown
3. Observe the button text shows "char" instead of the selected name

Expected Behavior

1. Parameter labels should include units, e.g., "Spatial Frequency (°)", "Pole Azimuth (°)", "Pole Elevation (°)"
2. Arena type dropdown should display the selected arena name

Environment

• MATLAB R2025b Update 2
• Observed while comparing PatternGeneratorApp output with webDisplayTools Pattern Editor