MyList v1.5.0

v1.5.0 — Mini launcher delete actions

• Added delete actions for mini launcher orbit nodes and search results.
• Kept the launcher active while context menus and confirmation dialogs are open so delete flows complete cleanly.
• Wired collection and item deletion through the existing main view-model commands.

Validation:

• dotnet test MyList.sln -c Release (141 passed)