SONAR-17311 Fix projects label

server/sonar-web/src/main/js/apps/projects/components/PageHeader.tsx

           })}>
           {total != null && (
             <span className="projects-total-label">
-              <strong id="projects-total">{total}</strong> {translate('projects._projects')}
+              <strong id="projects-total">{total}</strong> {translate('projects_')}
             </span>
           )}
         </div>

server/sonar-web/src/main/js/apps/projects/components/__tests__/__snapshots__/PageHeader-test.tsx.snap

           12
         </strong>
          
-        projects._projects
+        projects_
       </span>
     </div>
     <div
           2
         </strong>
          
-        projects._projects
+        projects_
       </span>
     </div>
     <div

sonar-core/src/main/resources/org/sonar/l10n/core.properties

 #------------------------------------------------------------------------------
 
 projects.page=Projects
-projects._projects=projects
 projects.add=Create Project
 projects.create_application=Create Application
 projects.no_projects.empty_instance=There are no visible projects yet.