Display buttons to easily access groups

fixes https://gitlab.ruhr-uni-bochum.de/FDM/rdm-system/antleaf-projectmanagement/-/issues/472

hyrax/app/controllers/hyrax/dashboard_controller.rb

+# frozen_string_literal: true
+module Hyrax
+  class DashboardController < ApplicationController
+    include Blacklight::Base
+    include Hyrax::Breadcrumbs
+    include HyraxHelper
+    with_themed_layout 'dashboard'
+    before_action :authenticate_user!
+    before_action :build_breadcrumbs, only: [:show]
+    before_action :set_date_range
+
+    ##
+    # @!attribute [rw] sidebar_partials
+    #   @return [Hash]
+    #
+    # @example Add a custom partial to the tasks sidebar block
+    #   Hyrax::DashboardController.sidebar_partials[:tasks] << "hyrax/dashboard/sidebar/custom_task"
+    class_attribute :sidebar_partials
+    self.sidebar_partials = { activity: [], configuration: [], repository_content: [], tasks: [] }
+
+    def show
+      @collections_to_display = list_collections_to_display
+      if can? :read, :admin_dashboard
+        @presenter = Hyrax::Admin::DashboardPresenter.new
+        @admin_set_rows = Hyrax::AdminSetService.new(self).search_results_with_work_count(:read)
+        render 'show_admin'
+      else
+        @presenter = Dashboard::UserPresenter.new(current_user, view_context, params[:since])
+        render 'show_user'
+      end
+    end
+
+    private
+
+    def set_date_range
+      @start_date = params[:start_date] || Time.zone.today - 1.month
+      @end_date = params[:end_date] || Time.zone.today + 1.day
+    end
+  end
+end
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