Pachli Current: use orange app icon for notifications to match app icon color

[foss-]

Currently the notifications icon is blue for pachli and green for pachli current.

Expected
This is slightly confusing. Matching application icon colors would be more consistent:

• blue for pachli
• orange for pachli current

[nikclayton]

Good point. Thanks for the report.

[foss-]

Looks lovely in Pachli Current 🧡