Fix messages in correlation matrix plot
Fix messages in correlation matrix plot

- correlation values has c()
- error messages were too big for the plot

FransMeerhoff/jasp-desktop,FransMeerhoff/jasp-desktop,AlexanderLyNL/jasp-desktop,jasp-stats/jasp-desktop,boutinb/jasp-desktop,jasp-stats/jasp-desktop,AlexanderLyNL/jasp-desktop,TimKDJ/jasp-desktop,FransMeerhoff/jasp-desktop,TimKDJ/jasp-desktop,vankesteren/jasp-desktop,FransMeerhoff/jasp-desktop,boutinb/jasp-desktop,vankesteren/jasp-desktop,vankesteren/jasp-desktop,AlexanderLyNL/jasp-desktop,AlexanderLyNL/jasp-desktop,AlexanderLyNL/jasp-desktop,boutinb/jasp-desktop,TimKDJ/jasp-desktop,vankesteren/jasp-desktop,AlexanderLyNL/jasp-desktop,boutinb/jasp-desktop,boutinb/jasp-desktop,TimKDJ/jasp-desktop,FransMeerhoff/jasp-desktop,FransMeerhoff/jasp-desktop,jasp-stats/jasp-desktop,AlexanderLyNL/jasp-desktop,FransMeerhoff/jasp-desktop,vankesteren/jasp-desktop,jasp-stats/jasp-desktop,TimKDJ/jasp-desktop,jasp-stats/jasp-desktop,vankesteren/jasp-desktop,jasp-stats/jasp-desktop,boutinb/jasp-desktop,FransMeerhoff/jasp-desktop,TimKDJ/jasp-desktop,AlexanderLyNL/jasp-desktop,jasp-stats/jasp-desktop,TimKDJ/jasp-desktop,vankesteren/jasp-desktop,TimKDJ/jasp-desktop,jasp-stats/jasp-desktop,boutinb/jasp-desktop,vankesteren/jasp-desktop,boutinb/jasp-desktop