Set pitch range
Fix misalignment in Song Editor
Merge pull request #1294 from Umcaruje/stable-1.1-uifix

Fix misalignment in Song Editor
Merge pull request #1288 from tresf/stable-1.1

Set pitch range
Don't display 'Help' action in context menus when there's no help text

Fixes #1290
Caption menu style fix
Improvement of FxMixer multithreading
Use dynamic building of jobqueues with dependency counting:
- At the start, each channel that has no dependencies is added automatically to the queue
- Then, after each channel is processed, it increments the dep.counter of all its recipients
- When a channel's dep.counter hits the amount of its dependencies (senders), it gets automatically added to the queue
- The queue is finished when the master channel has been processed
- Muted channels are automatically processed at the start regardless dependencies, because they don't have to care about senders, being muted

Hopefully this will improve Fx Mixer performance.
Merge pull request #1299 from LMMS/stable-1.1-iss1290

Disable 'Help' action in context menus when there's no help text
Fix segfault when enabling/disabling sends while playing
More updates to FxMixer - better handling of muted channels
Add a method to track value changes in AutomatableModel - this can be used by DSP code instead of signals/slots to improve performance
Modify BassBooster to show how to replace signals/slots in DSP
Merge pull request #1307 from diizy/model

Add a method to AutomatableModel that allows tracking changes without using signals/slots
Merge pull request #1305 from diizy/stable-1.1

Improvement of FxMixer multithreading
Merge branch 'stable-1.1'

Conflicts:
	include/AutomatableModel.h
	include/FxMixer.h
	src/core/FxMixer.cpp
	src/gui/widgets/caption_menu.cpp
	src/tracks/InstrumentTrack.cpp