1. fetchResearchResults.class.ts & searchResearchResults.service.ts: Change queries when searching results of organizations/ projects/ dataproviders to sort by date (landing page tabs).
2. dataProvider.component & project.component:
a. Use <search-result> instead of <result-preview>.
b. Add in "view all" link of search tabs parameter for sorting by date.
c. [Bug fix] Show tabs loading only when tabs are not initialized (if not tabs, don't show loading forever).
3. project.component:
d. Make "#search_tab" template same as in "dataprovider.component" (will be possibly replaced by common component).
e. In Deposit link use secondary button.
f. In pie chart (in statistics), enable "dataLabels".
git-svn-id: https://svn.driver.research-infrastructures.eu/driver/dnet40/modules/uoa-services-library/trunk/ng-openaire-library/src/app@58799 d315682c-612b-4755-9ff5-7f18f6832af3
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