Changeset [ccadc0ef2a54cd07a1328c1aa82eed93cd73be3e] by Gregg Helt

Reworked sequence alteration annotation dialog so user can input residues on either plus or minus strand, and is mirrored on opposite strand. Also limiting input to [acgtnACGTN]. Hiding opposite strand if input text length exceeds input element size, as this triggers text scrolling that can't (as far as I can determine) be synced in the opposite strand input element.
https://github.com/GMOD/jbrowse/commit/ccadc0ef2a54cd07a1328c1aa82e...