color support prototype
Merge branch 'master' into colors
Merge branch 'master' into colors
box shadow is set to have the color of the border line color

selection shadow is an outer shadow instead of an inner one
empty registry values for colors (default)
support passing default colors in constructor argument
passing default background color in constructor argument
MetaDecorator supports colors
Merge branch 'master' into colors
implementation of simple worker task and the worker framework
rename & reorder visualizers
implementing workers
typo fix & bugfix

initialie first sheet on creation correctly
default router is the AutoRouter
display message to the user if no tabs are available
panel title when panel has tabs
no tabs message update
display name of the contrainer object in panel title
Merge branch 'master' into colors
delete unused values