Icon Settings app project setup
MTFontIconView exposes baseline and scale adjustement properties
New proportionalOffsetTop MTFontIconView property
Revert "New proportionalOffsetTop MTFontIconView property"

This reverts commit 49608ca08e930574016af2ad412ac6ccc0d8e1d7.
MTFontIconView proportional offset default value should be 0
Revert "MTFontIconView proportional offset default value should be 0"

This reverts commit 47ebd18622ae2adb9b913c67007e10fccefad8e7.
Added stepper to tune the base line adjustement
Added label to show baseline adjustement value
Added steppers for scale adjustement and proprotional offset top
Mini tuning of the steppers
Added a picker to load all the icons in the set
Keeping track of the settings when changing current icon
Added button to apply previous icon metrics to current one
Using a finer step to tweak baseline and scale makes offset useless
Added option to send configuration file via email