CMS-1975 Make the BrowseFilterPanel search box look like it does in the old admin

Created classes for FilterTextField and clear link. Updated css styles
to conform old design
Merge branch 'master' of github.com:enonic/wem-ce into CMS-1975

Conflicts:
	modules/wem-webapp/src/main/webapp/admin2/api/js/main.ts
Merge pull request #336 from enonic/CMS-1975

CMS-1975 Make the BrowseFilterPanel search box look like it does in the ...