optimize feature model sorting

[uclaros]

fix #3637

[github-actions]

Pull Request Test Coverage Report for Build 11243801874

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 164 unchanged lines in 8 files lost coverage.
• Overall coverage decreased (-0.2%) to 60.149%

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Files with Coverage Reduction	New Missed Lines	%
input/app/featuresmodel.h	1	0.0%
input/app/attributes/attributecontroller.cpp	1	77.23%
input/app/notificationmodel.cpp	3	49.44%
input/core/merginuserauth.cpp	9	75.95%
input/core/merginapi.cpp	13	78.95%
input/app/valuerelationfeaturesmodel.cpp	20	75.0%
input/app/featuresmodel.cpp	32	68.98%
input/app/main.cpp	85	32.75%

Totals
Change from base Build 11166700037:	-0.2%
Covered Lines:	7728
Relevant Lines:	12848

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💛 - Coveralls

[tomasMizera]

As discussed on the call, marking it here for reference

[tomasMizera]

As agreed

• add flag to not follow attribute table sorting
• see if we can get info if QGIS will order features or a data provider itself

[tomasMizera]

Looking good now, thanks! We will start testing