Merge pull request #404 from diizy/stable-0.4

Sidebar updates
Drumsynth: make rendering use the mixer samplerate instead of hard coded 44100.
Merge pull request #408 from diizy/stable-0.4

Fix bug in AutomatableModel, also: save as icon
Merge pull request #406 from softrabbit/stable-0.4

Drumsynth: make rendering use mixer samplerate instead of hard coded 44100
fix for #405 . fixes bad placement of Automation_editor and piano_roll windows on initial opening.
Update AutomationEditor.cpp
Increased envelope times
Revert accidental change
Merge pull request #410 from mikobuntu/stable-0.4

fix for #405 . fixes bad placement of Automation_editor and piano_roll w...
Merge pull request #412 from diizy/stable-0.4

Pattern: fix beat pattern behaviour with different time signatures
Merge pull request #411 from zonkmachine/Envelope_time

Envelope time
Pattern: Refactor getNoteAtStep -> noteAtStep