Fix code editor checks and settings

[priahoud]

• Disables explicit setting of Project file generation flags (works fine without any setting and should generally not override the users preference)
• Replaces the old Extension ID "ms-vscode.csharp" with the new "ms-dotnettools.csharp"
• Switches the old Omnisharp "useGlobalMono" setting to the new "useModernNet" one
• Updates the Mono SDK Extension to Version 6 (old settings would show the warning dialog every time the code editor would be spawned)

[flathubbot]

Started test build 14527

[flathubbot]

Build 14527 failed

[flathubbot]

Started test build 14530

[flathubbot]

Build 14530 failed

[FullStackFlamingo]

Wow, thanks so much @priahoud for doing the work to get Unity development working on flatpak again! Really appreciate it. I was going to start the new year by attempting this, but I see you've beat me to it on https://github.com/flathub/org.freedesktop.Sdk.Extension.mono6/pull/13

[priahoud]

Wow, thanks so much @priahoud for doing the work to get Unity development working on flatpak again! Really appreciate it. I was going to start the new year by attempting this, but I see you've beat me to it on flathub/org.freedesktop.Sdk.Extension.mono6#13

Thank you! Good to know I am not the only one that wants to see it working again.

[priahoud]

bot, build

[flathubbot]

Queued test build for com.unity.UnityHub.

[flathubbot]

Started test build 14667

[flathubbot]

Build 14667 successful To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/127089/com.unity.UnityHub.flatpakref

[flathubbot]

Started test build 16061

[flathubbot]

Build 16061 successful To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/128485/com.unity.UnityHub.flatpakref

[refi64]

thanks!