Display illustration and message if no filter is selected

(cherry picked from commit 686198d377a6714cbc825e0df44ca00623b0a17f)

app/assets/stylesheets/framework/images.scss

@@ -20,7 +20,7 @@
     width: 100%;
   }
 
-  $image-widths: 80 250 306 394 430;
+  $image-widths: 80 130 250 306 394 430;
   @each $width in $image-widths {
     &.svg-#{$width} {
       img,

app/views/dashboard/issues.html.haml

@@ -12,4 +12,8 @@
     = render 'shared/new_project_item_select', path: 'issues/new', label: "New issue", with_feature_enabled: 'issues', type: :issues
 
 = render 'shared/issuable/filter', type: :issues
-= render 'shared/issues'
+
+- if current_user && @no_filters_set
+  = render 'shared/dashboard/no_filter_selected'
+- else
+  = render 'shared/issues'

app/views/dashboard/merge_requests.html.haml

@@ -8,4 +8,8 @@
     = render 'shared/new_project_item_select', path: 'merge_requests/new', label: "New merge request", with_feature_enabled: 'merge_requests', type: :merge_requests
 
 = render 'shared/issuable/filter', type: :merge_requests
-= render 'shared/merge_requests'
+
+- if current_user && @no_filters_set
+  = render 'shared/dashboard/no_filter_selected'
+- else
+  = render 'shared/merge_requests'

app/views/shared/dashboard/_no_filter_selected.html.haml

+.row.empty-state.text-center
+  .col-xs-12
+    .svg-130
+      = image_tag 'illustrations/issue-dashboard_results-without-filter.svg'
+  .col-xs-12
+    .text-content
+      %h4
+        = _("Please select at least one filter to see results")

app/views/shared/issuable/_filter.html.haml

@@ -25,8 +25,9 @@
         .filter-item.inline.labels-filter
           = render "shared/issuable/label_dropdown", selected: selected_labels, use_id: false, selected_toggle: params[:label_name], data_options: { field_name: "label_name[]" }
 
-        .pull-right
-          = render 'shared/sort_dropdown'
+        - if !@no_filters_set
+          .pull-right
+            = render 'shared/sort_dropdown'
 
   - has_labels = @labels && @labels.any?
   .row-content-block.second-block.filtered-labels{ class: ("hidden" unless has_labels) }