Fixed Issue #24485. Changed Ctrl+Alt+T shortcut to Alt+T for adding tempo.
	modified:   shortcuts.xml
fixes for pianoroll editor
Merge pull request #814 from andreituicu/fix_24485_Ctrk_Alt_T

Fixed Issue #24485. Changed Ctrl+Alt+T shortcut to Alt+T for adding tempo
Merge pull request #815 from trig-ger/midi_fixes

MIDI import: optimization for speed