This builds off of rBf951aa063f7, adding a weight parameter which can
be used to change the order of items when they have the same match
score. In the future, if string searching gets a C++ API, we could
use an optional parameter for the weight, since it is not used yet.
This will be used for the node link drag search menu (D8286).
Differential Revision: https://developer.blender.org/D13559
Use a map to speed up search for UI block names.
Time to redraw the node editor was decreased from
around 75-120ms to 40-70ms in a tree with many
Geometry Nodes.
Differential Revision: https://developer.blender.org/D13225
This allows the use of better/more readable data structures,
and will also make some refactors to the search button easier.
The build completed on the buildbot for all platforms.
