Fix follow-up problem for issue #2074 (#2509)
Fix follow-up problem for issue #2074 (#2509)

The residuals vs covariates plot for the first covariate is shown twice if the first three residual plot options are selected. If the residuals vs covariates plot is option selected while the residuals vs dependent option is not selected, an error message occurs.

The current changes fix both problems.
jasp-stats/jasp-desktop,vankesteren/jasp-desktop,vankesteren/jasp-desktop,AlexanderLyNL/jasp-desktop,boutinb/jasp-desktop,FransMeerhoff/jasp-desktop,AlexanderLyNL/jasp-desktop,TimKDJ/jasp-desktop,TimKDJ/jasp-desktop,boutinb/jasp-desktop,boutinb/jasp-desktop,AlexanderLyNL/jasp-desktop,vankesteren/jasp-desktop,AlexanderLyNL/jasp-desktop,boutinb/jasp-desktop,AlexanderLyNL/jasp-desktop,jasp-stats/jasp-desktop,boutinb/jasp-desktop,vankesteren/jasp-desktop,FransMeerhoff/jasp-desktop,TimKDJ/jasp-desktop,AlexanderLyNL/jasp-desktop,vankesteren/jasp-desktop,jasp-stats/jasp-desktop,jasp-stats/jasp-desktop,boutinb/jasp-desktop,jasp-stats/jasp-desktop,TimKDJ/jasp-desktop,FransMeerhoff/jasp-desktop,vankesteren/jasp-desktop,jasp-stats/jasp-desktop,FransMeerhoff/jasp-desktop,boutinb/jasp-desktop,vankesteren/jasp-desktop,TimKDJ/jasp-desktop,boutinb/jasp-desktop,jasp-stats/jasp-desktop,TimKDJ/jasp-desktop,AlexanderLyNL/jasp-desktop,TimKDJ/jasp-desktop,jasp-stats/jasp-desktop,TimKDJ/jasp-desktop,FransMeerhoff/jasp-desktop,FransMeerhoff/jasp-desktop,vankesteren/jasp-desktop,FransMeerhoff/jasp-desktop,AlexanderLyNL/jasp-desktop,FransMeerhoff/jasp-desktop