Add more context to some Window errors
#82590
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akien-mga
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YuriSizov
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bruvzg
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We have some error messages throughout the engine which have pretty vague statements in them, without pointing to any specific context. This PR addresses a couple such examples in
Window(andControl).Mainly, this PR unifies the checks and the error message for the infamous transient parent exclusive child operation, and adds some details about the current node, the parent, and the other child that conflicts with our current node. Since this message can happen in the editor without much user agenda, we need all 3 to understand where it's coming from.
For example, we have this issue with the MSBuild panel when building fails:
Seems like the progress bar that appears during the build conflicts with the error message that we pop at the end. This wasn't so obvious before and required more debugging and digging. (cc @raulsntos this should help!)
PS. Rest in peace, "Transient parent has another exclusive child." You are "Attempting to make child window exclusive, but the parent window already has another exclusive child." now.