* Replace deprecated sprintf() function
* Update microtuner-related UI (add more clues explaining how to use it)
* Simpler wording in the tooltips for "apply" buttons
* Post-merge fix of a forward declaration
* Rename Misc tab to Tuning and transposition; move Microtuner config dialog to Edit menu and make it also available from instrument tab
* Enable word wrap on "MIDI unsupported" label
* Remove forgotten new unnecessary includes
* Rename InstrumentMiscView to InstrumentTuningView in locales
This PR places all LMMS symbols into namespaces to eliminate any potential future name collisions between LMMS and third-party modules.
Also, this PR changes back `LmmsCore` to `Engine`, reverting c519921306 .
Co-authored-by: allejok96 <allejok96@gmail.com>