1. env-properties.ts: Added property "footerGrantText?: string"
2. bottom.module.ts: Imported "HelperModule" (div help content added in footer)
3. bottom.component.ts:
a. Comment "grantAdvanceText" and "grantConnectText".
b. If property "footerGrantText" is not set, get div help contents for "/" page route.
4. bottom.component.html:
a. If "properties.footerGrantText" is set, show it as html.
b. Show div help contents for "footer" divId.
git-svn-id: https://svn.driver.research-infrastructures.eu/driver/dnet40/modules/uoa-services-library/trunk/ng-openaire-library/src/app@61039 d315682c-612b-4755-9ff5-7f18f6832af3