feat: option to disable floating windows initial centering

[Video-Nomad]

Issue: some apps (Autodesk Maya, 3ds Max) have a workflow of creating floating windows constantly. Setting a rule of "set floating" to those windows will center them on the screen every time you open them. By default, those apps keep the position of those windows internally, but GlazeWM will treat them as new windows every time and center them (even within one session).

Solution: have an option to disable initial centering of newly created floating windows. Default behavior will not change, unless the user decides to set the option to false. I keep it constantly to false in my build.

Possible issues: I haven't tested this on a multi-monitor setup, as I don't use multiple screens.

Partially closes the (#436)

[lars-berger]

Hey, thanks for the PR! 👍 Started a poIl in the discord just now for whether we should change the default to false instead. I actually think more people find the centering annoying than useful, but we can wait a few hours before making the change

There's a minor issue when using multi monitors. If you have an empty workspace 1 on monitor A and a non-empty workspace 2 on monitor B, then when a window is opened with workspace 1 focused, the OS will plop it on workspace 2. So there just needs to be a check in ManageWindowHandler.cs whether the window was opened on a different monitor than where it should go, and if so, translate it to center.

[Video-Nomad]

Thanks for the heads-up @lars-berger ! I need to buy a second monitor, I guess 😅
I think this check should do the trick. If the window is not in the correct workspace it will snap it to the center:

var targetWorkspace = WorkspaceService.GetWorkspaceFromChildContainer(targetParent);
var windowWorkspace = _monitorService
  .GetMonitorFromHandleLocation(windowHandle)
  .DisplayedWorkspace;

var floatingPlacement = originalPlacement;
if (windowWorkspace != targetWorkspace ||
    _userConfigService.GeneralConfig.CenterNewFloatingWindows)
{
  floatingPlacement = floatingPlacement.TranslateToCenter(targetWorkspace.ToRect());
}

Let me know if it will work, I can't really test it on my end at the moment.

Also, how's the poll going? Should I change the floating centering to be false by default?

[lars-berger]

@Video-Nomad Surprisingly it looks like more people prefer the default centering behavior (15:4 votes so far), so it's fine to leave as is 👍

Thanks for the snippet, I can test it out later and commit it directly to your branch