fix: MenuItem hover animation disappears after click

[jbryknar]

Pull request type

Please check the type of change your PR introduces:

• Update
• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes

What is the current behavior?

The MenuItem in the menu displays a smooth hover animation when the mouse pointer is over it. However, after clicking the button, the hover visual state disappears and does not return until the mouse is moved outside the item and then back onto it. This creates a temporary loss of visual feedback, which may feel inconsistent or unintuitive to users.

To reproduce this issue:

• Open the WPF UI Gallery application.
• Navigate to the Menu section.
• Click on the "Bold" menu item.
• Observe that the hover effect disappears and does not return until the mouse is moved away and back again.

Before Fix

Issue Number: #1394

What is the new behavior?

The hover visual feedback now remains active while the MenuItem is pressed and the mouse is still over it. This is achieved by adding a new MultiTrigger that responds to both IsMouseOver and IsPressed properties. As a result, the hover animation no longer disappears immediately after clicking the item, providing a more consistent and intuitive user experience.

Theme Brushes for Menu and MenuItem:

SolidColorBrush	Color	Light	Dark
MenuBarBackground	SubtleFillColorTransparent	#00FFFFFF	#00FFFFFF
MenuBarItemBackgroundSelected	SubtleFillColorSecondary	#09000000	#0FFFFFFF
MenuBarItemBackgroundPressed	SubtleFillColorTertiary	#06000000	#0AFFFFFF
MenuBarItemBorderBrush	ControlAltFillColorTertiary	#0F000000	#0BFFFFFF
MenuBarItemTextForegroundPressed	TextFillColorSecondary	#9E000000	#C5FFFFFF

After Fix

Other information

N/A