Reworks the QgsLayoutItem API for handling multi-layered exports
to work as an iterator. The advantage with this is that it avoids
items needing to calculate in advance how many layers they require
in the output file.
This setting, which is disabled by default and placed into an
"advanced" group on PDF/SFG export, disables the built-in
raster layer tiled rendering. While the tiling is good for
memory usage, it can cause visible "seams" in the rasters
for generated PDF/SVG files.
The setting has a tooltip warning users that disabling the
tiling results in high memory usage during exports.
Fixes#19500
Because selection was deactivated in layout, selection color was not transmitted from QgsProject to QgsLayoutRenderContext to QgsMapSettings.
forward porting of #7294
The capability to print selection has been removed by the commit aaa7003 to
prevent accidental selections showing in exports from composer.
It is reactivated only for QGIS Server.
Fixes#13459 QGIS Server WMS GetPrint request don't respect SELECTION parameter
It's a forward porting of #7185
Checks whether a function declaration has parameters that are
top level const.
const values in declarations do not affect the signature of a
function, so they should not be put there.
