Added Preferences dialog
Simple mode
Add defaults into Tooltips from #885
Bugfix: not all the calls to travel_to() were updated
Bugfix: retract speed was applied to travel
Merge branch 'master' into simple-mode
Fix cooling and load in simple-mode. #1001
Reorder options in simple mode
Some more tweaks
Advertise the expert mode in simple mode
Refactor simple mode definitions to dedicated SimpleTab classes
New --no-plater and --gui-mode options. #604
Merge pull request #962 from scottp/issue_885b

Add defaults into Tooltips from #885
Fixed regression causing thin walls to be processed twice, thus producing overlapping straight paths and zigzag. #1035
Tiny optimization
Make sure the inwards move after last perimeter loop doesn't exceed object boundary
Add a command to lift nozzle in default start G-code
New option to disable retraction on layer change
Bugfix: *-acceleration options didn't work in CLI
Don't apply acceleration settings to travel moves