[Feature request] - System hairpins
This is to request to include hairpins as system lines like system text lines. The reason is, in some orchestral scores (such as those by Kodaly, Szymanowski), dynamics and hairpins are sometimes printed above the whole system. Dynamics and can be entered as SMUFL dynamic marks, but we can't draw a system hairpin like in Sibelius. So just include "crescendo hairpin (system)" and "diminuendo hairpin (system)".