Smart Property Creation Functionality

This PR includes this tested functionality:
 1. Send BTC/MSC/TMSC/Smart Property using the new API built around Master Core. (Thanks to @achamley and @faizkhan00 for their help and contributions)
 2. Smart Property categories and subcategories listed in a searchable combobox, in alphabetic order.
 3. List of Categories/Subcategories from ISIC Codes. (Credits to @marvengine for the database file)
 4. Smart Property and Crowdsale creation.

This branch as merged and synced upstream from #598 #614 #604 #569 #570 #571

- Fix #504 
- Fix #576