D-Net

1. subscribe.component: disable subscribe/unsubscribe button when already pushed | add notification when subscribe/unsubscribe fails.
2. subscribe.service: return null in 'isSubscribedToCommunity' function if request fails.

Add 'feedbackmailForMissingEntities' property.

dataProviderInfo.ts: 27/09/2018 changes in tabs/type according to spreadsheet for datasource typology.

dataProviderInfo.ts: Add 'software' and 'orp' tabs in 'crissystem' and 'datarepository::unknown' types

Claims: change the remove button to bin icon
Browse: add search and sort in view more
Download results link: make it a link

Dispaly claims:
show the link to openaire
change claims to links
Change stats url to use production stats
Change widget url to use production
Hide Orp/software for production

1. Add userEmailPreferences page, where user chooses for every openaireId, for which he/she is a manager, IF and HOW OFTEN prefers to receive email notifications.
2. errorCodes.ts & errorMessages.component: Add 'FORBIDDEN' errorCode and appropriate errorMessage.

claimsByToken: 'token' is not used anymore for claims. Instead it is used 'projectId'.

Show CSV button always in search and advanced search pages. In case of >csvLimit results it is disabled (cursor: not-allowed) with appropriate tooltip.

1. displayClaims.component: bug fix in keyword search.
2. dataset.component, orp.component: spelling corrections (#3845).
3.check before unsubscribe in landing and search/find, change the cookie link in app component