[URL Field] Integrating Storage Selector for file selection

- HTML template updated to conditionally add styling and the `<storage-selector>` directive
- Directive
	- added dependency on Storage Selector
	- includes `hideStorage` and `companyId` local scope properties
	- conditionally listens for Storage Selector `pick` event and applies the value of the url to `scope.url`
	- function `configureStorageUrl` added for refactoring the storage url to be compliant with use as the `src` value of an iframe
- e2e tests added
- demo updated to include new attributes and Storage Selector dependency
- bower updated to include Storage Selector dependency