LegacyInjector: Allow setting the application name

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Teach CodeHacker to edit/add exception handlers

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Move NoSuchMethodError handling from fiji-compat into ij-legacy

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
TODO: ij-legacy: clarify the double-purpose of LegacyHacker

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>