* added correct injection of assets + export path to blueprints
* moved a few common elements to "core" for better reuse
* more tweaks/ experiments with paths handling
* moved & overhauled a few of the blueprint & assets tools
* lots of minor tweaks & changes
* improvements to assets ui
* assets ui now specific to per level data, not based on selection anymore
* blueprints ui now presents assets per blueprint
* a lot of tweaks & improvements in the areas above