Fix preview panel fields parsing

[Withalion]

fix #4031

When the user specifies the mapTooltip in QGIS on Windows, we don't remove the \r line delimiter, while parsing the field names. Thus no field names matches except the last one.

[github-actions]

Pull Request Test Coverage Report for Build 17733319793

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 72 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.001%) to 19.572%

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Files with Coverage Reduction	New Missed Lines	%
mm/app/attributes/attributepreviewcontroller.h	1	50.0%
mm/app/main.cpp	71	35.37%

Totals
Change from base Build 17678033457:	0.001%
Covered Lines:	13868
Relevant Lines:	70855

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💛 - Coveralls