Bluemap fixes and cleanup

[lexiccn]

Fixes

• BlueMap provinces did not update with new Border colour during Land Validation
• BlueMap provinces did not update with new Fill colour during Nation colour change
• BlueMap provinces were not setting or updating border weight
• Fixes one point where Color is compared to int

Cleans up

• Simplifies use of BlueMap Color by using a constructor to directly take int & opacity
• Removes redundant checks of Color equality (this will be done in other maps in separate PR)

[Goosius1]

• I merged the other PR
• As you indicated, there's now a conflict here
• I'll resume review when that is fixed, thanks!

[ItsJuls]

🙏