D-Net

Add guard for subscribers, remove unused property properties from guards, read properties properly from guard

Add title in meta in communityErrorPage.component

Replace Meta service Import and use with Meta and Title from angular/platform-browser for dataset.component and dataset.module

Remove this._meta.updateTag({content:url},property=og:url);

Replace Meta service Import and use with Meta and Title from angular/platform-browser for errorPage.component and error.module

1. In searchPage and searchPageTableView bug fixing in widths and help texts.

Replace Meta service Import and use with Meta and Title from angular/platform-browser for communityErrorPage.component and communityError.module

add piwikSiteId in properties | pass it as input in all components | in piwik service use it either from parameter pass if available or from properties

added statisticsEntities.ts

1. Change the way variable of type 'EnvProperties' is accessed in guards.
2. Add <ng-content> in modal of openaireLibrary. (e.g. for nested component)