show warning if width or height of exported image is larger than QPainter limit (refs #41045) #56054
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Description
When exporting a map to an image via "Project → Import/Export→ Export Map to Image" user can get a truncated output if image width or height hits
QPainter
limits. To make uses aware about this issue and give them a chance to adjust output image dimensions this PR adds a warning message bar to the "Export Map to Image" dialog.Refs #41045.