fix #37076: Staccatissimo sounds like legato

and while at it also add marcato and portato
adjust templates to the new articulations
adjust Guitar Pro mtest to the new articulations
Adjust "My_First_Score" to the new articulations
Merge pull request #1396 from Jojo-Schmitz/staccatissimo

fix #37076: Staccatissimo sounds like legato