Bug fixes and Performance improvements

This update adds the following new features:

•  Support for new iPhone models (e.g. iPhone 11 variants).
•  MIDI channel for virtual on-screen MIDI controls is now configurable.
•  MIDI events monitor may now be paused (either by new pause button or by long-tap context menu).
•  Added optional filter for MIDI RT Clock events.
•  Added support for sending MIDI Program Change commands.
•  Added support for sending MIDI Real-Time Messages (Start, Stop, Continue, Active Sensing, Reset all Receivers).
•  Added support for sending MIDI Note Pressure (Polyphonic Aftertouch).
•  Added support for sending MIDI Channel Pressure (Monophonic Aftertouch).
•  Added option for forcing the app to continue running in the background (i.e. to capture MIDI data on MIDI events monitor while working with another audio / MIDI app in foreground).
•  iPhone: MIDI events monitor may now be cleared by long-tap context menu.

This update also fixes thes following issues:

•  Fixes issues with the graphical user interface (iOS 13).
•  Fixes graphical issues with some older iPhone models.
•  MIDI event monitor: MIDI channel numbers are now displayed starting by 1, as commonly expected in MIDI world (not by 0 as actually on technical level which was apparently confusing for many users).
•  Fixed some MIDI SysEx messages not being displayed correctly with certain Bluetooth LE MIDI connections.
•  Fixed issue with touch events on lower edge of screen (iOS 11 and higher).

**NOTE**: The previous clear button had been replaced by a pause button. You can find the clear function now from the context menu (popup menu) by long tapping onto the MIDI events monitor.

That's it for now, thanks for your feedback and take care!

•  Adds native 64 bit support.
•  Adds Bluetooth LE MIDI support.
•  Fixes issue on recent devices and recent iOS versions where the virtual MIDI keyboard did not appear on the screen.
•  Allows to adjust font size of MIDI events and MIDI device names on settings screen.
•  Adds more filter options for MIDI System Exclusive (SysEx) messages and MIDI Control Change (CC) messages.
•  Shows now a red warning text in case some MIDI filter is enabled.
•  Adds "Copy" popup menu when tapping long on the MIDI events display, which copies all MIDI events as multi-line text to the iOS clipboard.
•  Minor graphical updates.

- Configure your own MIDI controllers for all on-screen controls !
- Shows now also virtual CoreMIDI ports (i.e. Apps).
- MIDI sense messages may now be filtered (optional as setting).
- Added button for clearing MIDI event screen (only on iPad).
- Fix: Time Code events were displayed as "Invalid".
- Fix: Font for MIDI event messages was too big on iPhone/iPod touch.
- Various other cosmetical fixes.

- iOS7 fix: MIDI monitor section became white on incoming MIDI events.

- Fixed hanging keys of on-screen virtual MIDI keyboard.
- Support for iOS 7.
- Support for 4 inch screens.
- Fixed several problems with MIDI driver.

- Support for new "JACK Audio Connection Kit" features: App can now be started & stopped directly from the JACK control app, and screen can be switched quickly between the JACK control app and the MIDI Wrench app.

- Several MIDI event handling fixes.

- Support for "JACK Audio Connection Kit" for MIDI connections from/to other audio apps.
- Fixed several issues regarding incoming MIDI event handling.