sensible arranger entrypoint! now let's see whats up with the align modifiers

src/arranger/arranger_track.rs

@@ -1,7 +1,7 @@
 use crate::*;
 impl Arranger {
     pub fn track_next_name (&self) -> String {
-        format!("T{}", self.tracks.len() + 1)
+        format!("Tr{}", self.tracks.len() + 1)
     }
     pub fn track_add (&mut self, name: Option<&str>, color: Option<ItemPalette>)
         -> Usually<&mut ArrangerTrack>