maui [iOS] Transparent button border color when border color is not set

Issues Fixed

Fixes https://github.com/dotnet/maui/issues/24864

Before	After

Android:

Oct 18 '24 10:10 kubaflo

/azp run

Oct 21 '24 14:10 jsuarezruiz

Azure Pipelines successfully started running 3 pipeline(s).

Oct 21 '24 14:10 azure-pipelines[bot]

/azp run

Oct 22 '24 12:10 jsuarezruiz

Azure Pipelines successfully started running 3 pipeline(s).

Oct 22 '24 12:10 azure-pipelines[bot]

@jsuarezruiz @tj-devel709 yea I also think that the previous screenshots were incorrect Screenshot 2024-10-26 at 01 04 43

Oct 25 '24 23:10 kubaflo

/rebase

Nov 12 '24 14:11 jsuarezruiz

/azp run

Nov 12 '24 14:11 jsuarezruiz

Azure Pipelines successfully started running 3 pipeline(s).

Nov 12 '24 14:11 azure-pipelines[bot]

/azp run

Nov 15 '24 10:11 jsuarezruiz

Azure Pipelines successfully started running 3 pipeline(s).

Nov 15 '24 10:11 azure-pipelines[bot]

/rebase

Dec 18 '24 07:12 jfversluis

Azure Pipelines successfully started running 3 pipeline(s).

Dec 18 '24 07:12 azure-pipelines[bot]

@kubaflo Could you rebase to fix the conflicts? Thanks in advance.

Feb 06 '25 15:02 jsuarezruiz

@jsuarezruiz done

Feb 07 '25 10:02 kubaflo

Azure Pipelines successfully started running 3 pipeline(s).

Feb 17 '25 12:02 azure-pipelines[bot]

/rebase

Feb 19 '25 08:02 jfversluis

Azure Pipelines successfully started running 3 pipeline(s).

Feb 19 '25 08:02 azure-pipelines[bot]

I think the opposite was supposed to happen? If you went and set a border, but nothing appeared it would be more confusing that setting a border and seeing some black border.

Jun 12 '25 02:06 mattleibow

@mattleibow That's a great question—maybe you're right, and it's actually Android that needs to be fixed. Who would be the right person to make that call?

Jun 12 '25 23:06 kubaflo