* Fix for Issue #457 - changed m_nNumLoadedBanks to be m_nNumHighestBank and updated functionality in menus accordingly.
* Fix for Issue #460 implements MIDI Bank Select MSB/LSB based on PR #395 submitted by @abscisys
* Fix for Issue #458 to not show blank banks in the menus. Also handles MIDI bank select messages and won't change banks if the final selected bank isn't loaded.
* Firm up bank validity handling slightly.
* Fix for Issue #459 Initial support for loading of headerless SysEx voice banks as a configuraton option
* Fix for Issue #459 Added config option for headerless SysEx voice banks.
* Implement option to allow MIDI Program Change messages to select aross four consecutive banks as discussed in Issue #391.
Note: It does not check if consecutive banks are loaded. That is down to the user. The default is "enabled".