Restored the old Eyedropper tool from the 2.4 colour picker. Now it's an operator,
working nicely using rna properties (fixes#19475 and some todo items)
This ended up being a bit more work than expected, it involved converting the
colour picker to use RNA properties directly, rather than temporary values. This has
several advantages, including being able to type in RGB values greater than 1,
however there are still some redraw issues with sliders.
Also removed the alternate color pickers after this time spent testing, the current one
should be sufficient, or alternatives to the wheel can possibly become preferences
in the current design.
Converting the picker to RNA also made it very trivial to make a cool new
ColorWheel template, which can be embedded in UI layouts. I've enabled it already
in texture/vertex paint brush properties and the sequence editor color correction:
http://mke3.net/blender/devel/2.5/colorwheels.jpg
Until we have proper multi-object editing, this adds a Copy To Selected
option to the right mouse button menu for Object and Bone properties, to
copy the value from the active object to the selected objects.
Also includes some implementation changes to reset to default operator.
Added a new operator for properties which resets RNA-based settings to their 'default' values, as defined in RNA. This currently only works for floats, ints, enums, and booleans (strings and pointers still need to be implemented).
The current extensions to the RNA API that I've made here seem a bit excessive, and can be toned down if necessary. In short, I've just added accessor functions for the default-values of the property definitions.
For this to be really useful, many properties in RNA will need to get defaults defined, since the current defaults for quite a few properties tested were less than ideal.
