MSA updates

[JTPetter]

• Updated gauge r&R non. rep. help file.
• Gauge r&R linearity change default value of process variation to 1.
• Fix capitalization, aligned naming, and changed option names as suggested by Rene.
• Type1 Study: Changing percent of tolerance for Cg now affects boundaries displayed in plot.
• Type 1 Study: Added tolerance bounds to table.
• Type 1 Study: Added mean and three sigma limits to run chart.
• Type 1 Study: Added option to select left- or right-open bins and centered bins on integers.
• Gauge r&R Crossed: Changed order of variance components to display operator x part before part-to-part.
• Gauge r&R Crossed: Fixed bug where variance component table would display empty cells when historical std. dev. was used.
• Gauge r&R Nested: Implemented traffic light chart for regular output and report.
• Gauge r&R Crossed & Nested: Fixed crash of range chart and average chart per operator if only on measurement per part was supplied.
• Gauge Linearity: Changed order of Std. Error and t-statistic in regression table.
• Gauge Linearity: Added regression equation to output and made percent process variation graph in JASP style.
• Gauge r&R crossed and nested: Added gauge evaluation tables and number of distinct categories to report
• Gauge r&R crossed: Made more robust towards input that has no repeated measurements.
• Gauge r&R nested: Fixed calculation to always recognize nested structure.
• All MSA: Added error messages for missing values that crash analyses.
• Attribute Agreement: Fix crash when no standards were provided.
• Added verified unit tests.

The large number of changed lines is related to the updated unit tests (many new plot files).

[vandenman]

some minor comments below. Also, it's easier to review multiple smaller PRs than one big one!

[JTPetter]

Thanks - will try to make smaller PRs whenever possible.

[JTPetter]

Added fix for jasp-stats/jasp-issues#2867