Add Backspace to the table of key names. Closes #1631.
Disable the wxGTK accelerator workaround for wx 2.9.5

Unsurprisingly the munging around with the menu bar implementation
details has resulted in things breaking, but fortunately the problem it
was working around (#1314) appears to have been fixed entirely.

Closes #1628.
Switch to using Bind for DialogKanjiTimer events
Rewrite the auto-matcher for the karaoke timing copier

Operate on characters rather than bytes in the dialog so that it
actually works with Kanji.

Rewrite the auto-matcher to handle more cases and add unit tests for it.
Only go back one line rather than two