Great!! 
I know I’ve been wining about the lack of possibility to write “harmon mute” with text, but I know you’re working on it. But, when looking in this excellent list I see “harmon mute, stem left/right”. What on earth is that? Maybe this is the wrong forum for trumpet related questions, but I’m a jazz trumpet player and I’ve never heard that I can put the stem to the left or right. The only way know is in or out. Can anyone tell me how to put this little tube to the right? 
I simply LOOOVE the way barlines and time signatures popovers work, great!! 
Some other thoughts on the popover list:
• Some of the techniques are very long to type. To speed up the work flow I’d like to use the common and other abbreviations even in the popover. (e.g. leg (legato), vib (vibrato), str mute (straight mute) etc.
• When typing “open” it results in a circle and not the text “Open”. For a brass player this is a bit confusing, since the little circle means open with the plunger mute ("+" closed, and “o” open). To remove a brass mute “open” is the common way of notating.
• Adding Ornaments, Playing techniques, Text and Dynamics to several instruments/players in one go, the same way slurs works.
• Copy-paste/Alt-click glissando lines. (or as mentioned above, selecting several players and do it in one go)
• When adding a tempo mark as both tempo text (eg. Andante) and metronom mark (e.g. q=120) I like to separate them with a comma or put the metronome mark within a parenthesis. I don’t know if this is standard notation, but I think it looks good… 
• It’d be nice to have the option to edit the tempo markings and playing techniques instead of having to first delete them and then adding new ones. (work flow…)