add widget style fixed
Merge pull request #116 from reciprocity/feature/add-widget-fix

add widget style fixed
Fix add-item links for business objects and system/process

* added join_object_id and join_object_type support for ModalSelector
Use `RefreshQueue` to optimize tree branch loading
Remove widget-height optimization until it's optimized
Merge pull request #117 from reciprocity/feature/tree-add-items

A few optimizations and fix a couple cases of tree-item-add
Basic styling