basic overall price loader
added a static price to each component
drag and drop price
fixed a bug related to loading of templates
Merge branch 'cost-feature' of https://github.com/Fathalian/nestor into cost-feature

# By Zaryafaraj
# Via Zaryafaraj
* 'cost-feature' of https://github.com/Fathalian/nestor:
  moved all modals content into tabs, and styled them