Improved painting operation that reduces CPU usage even three times. Added separate class TbgPixmap that manages of generating pixmap. It is shared between TfingerBoard, TmainScore, and a widget under note name (single note mode) - those widgets paints a chunk of the pixmap itself, instead of being transparent and repaint itself whenever underlaying background was repainted.

Ticks width and gaps between depend on screen DPI, otherwise on high DPI screens volume/intonation views have too many ticks too close each. Volume view displays minimal value on the left, get rid of tool tip.

Fixed reading string and fret numbers from XML ('technical' attribute in 'notations' key), this way tips of melody on a chart displays string numbers if level has set it to TRUE
(grafted from c39f3017a8bbd474a986fc1d91a55e909d3bca40)

- Tcanvas::hasCertificate() added and m_certifyTip is simple pointer now
- decreased stamp animation time
- checking finished note index, when sniffing is just paused between start and finish on the note next melody may be asked

Using pause sniffing for answering melodies as such as for playing single notes, pitch detection is not stopped - it avoids to capture sounding previous note at the beginning of next melody

(grafted from eef6610b8c83cca9bc1f8da996a22888b5cb946f)

Fixed Nootini to load all wav-es (no more mixing of stereo channels), keeping connecting with 'unique connection' to avoid double work, moving progress item with scrolls, sketches of using libsndfile

Adjusted offline mode, stopping thread when goes TRUE, added method copyToBufferOffline that detecting in this (calling) thread.
- memcpy swapped with std::copy
- do not take -1 from framesPerChunk when copied
- simplify coping previous chunk when resetting, copy it directly to channel

Added missing semicolons at mac mime strings end. Removed deprecated UTExportedTypeDeclarations from script generating info.plist

Added missing condition for such a case, then moved hiding of melody button to TtoolBar::actionsToExam(), correctly set single mode state into global store,
removed unused call of setSingleNoteMode from executor

New method of copyToBuffer to grab all incoming data at once into token buffer. Pitch detection is performed in separate thread, launched in constructor, and probing for available data in the buffer.
In summary:
- input callback is less expensive, it just copies data
- transforming data to float is performed out of callback, in the thread
- no need to invoke thread every data incoming
- input forwarding seems to work even with PulseAudio
- buffer if bigger (16k), so chopping sound phenomenon disappeared

Invoke properly method finishCorrection() when only key signature was wrong and corrected. It fix  displaying 'what next tip' after