Use first feature in layer to generate symbol preview icon in widget #6380
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Uses the first feature found in a layer in order to create a better preview for the symbol in the symbol selector dialog. This allows data defined settings to be evaluated correctly (at least, for the first feature) and avoids missing previews due to missing attribute values when data defined settings are present. Fixes qgis#17061
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Uses the first feature found in a layer in order to create a better
preview for the symbol in the symbol selector dialog. This allows
data defined settings to be evaluated correctly (at least, for the
first feature) and avoids missing previews due to missing
attribute values when data defined settings are present.
Fixes #17061