Fixed index error in reflow of a short poem line with a deep Left indent
Fix index error on short poem line with large Left value
Usability -- added Undo/Redo/Find/Find Next/Find Previous shortcuts in the Edit menu.
HTML Language check panel. (Work in progress)

TODO:
  * the column resizing is not working well
  * sorting by columns does not resize the rows height
Remember more files in the Files menu. This should be an option somewhere though.
In the Notes tab, ctrl-alt-p now adds the folio number, not the image number.
Detect the encoding to use to load a document. First, try utf8, and if that fails, try latin1. This is the same algo as guiguts.
Detect the encoding to use to save a document. First try latin1, and if that fails, save as utf8. This is the same algo as guiguts.
Add per file option to also export to guiguts on saves.