OmniGears: Miscellaneous Classes

Adds Colorpicker preference
Adds Numberpicker preference

Change-Id: I86f72d7f039a51713bf460cbaec7d43bf27b293f
[Patch 14] OmniGears: Miscellaneous Classes

Adds Colorpicker preference
Adds Numberpicker preference

link: https://gerrit.omnirom.org/#/c/5739/