allow issue filter submission by clicking "Keep typing and press enter"

app/assets/javascripts/filtered_search/dropdown_hint.js.es6

@@ -20,6 +20,9 @@
       if (selected.tagName === 'LI') {
         if (selected.hasAttribute('data-value')) {
           this.dismissDropdown();
+        } else if (selected.getAttribute('data-action') === 'submit') {
+          this.dismissDropdown();
+          this.dispatchFormSubmitEvent();
         } else {
           const token = selected.querySelector('.js-filter-hint').innerText.trim();
           const tag = selected.querySelector('.js-filter-tag').innerText.trim();

app/assets/javascripts/filtered_search/filtered_search_dropdown.js.es6

@@ -84,6 +84,12 @@
       }));
     }
 
+    dispatchFormSubmitEvent() {
+      // dispatchEvent() is necessary as form.submit() does not
+      // trigger event handlers
+      this.input.form.dispatchEvent(new Event('submit'));
+    }
+
     hideDropdown() {
       this.getCurrentHook().list.hide();
     }

app/assets/javascripts/filtered_search/filtered_search_manager.js.es6

@@ -25,6 +25,7 @@
     }
 
     bindEvents() {
+      this.handleFormSubmit = this.handleFormSubmit.bind(this);
       this.setDropdownWrapper = this.dropdownManager.setDropdown.bind(this.dropdownManager);
       this.toggleClearSearchButtonWrapper = this.toggleClearSearchButton.bind(this);
       this.checkForEnterWrapper = this.checkForEnter.bind(this);
@@ -32,6 +33,7 @@
       this.checkForBackspaceWrapper = this.checkForBackspace.bind(this);
       this.tokenChange = this.tokenChange.bind(this);
 
+      this.filteredSearchInput.form.addEventListener('submit', this.handleFormSubmit);
       this.filteredSearchInput.addEventListener('input', this.setDropdownWrapper);
       this.filteredSearchInput.addEventListener('input', this.toggleClearSearchButtonWrapper);
       this.filteredSearchInput.addEventListener('keydown', this.checkForEnterWrapper);
@@ -42,6 +44,7 @@
     }
 
     unbindEvents() {
+      this.filteredSearchInput.form.removeEventListener('submit', this.handleFormSubmit);
       this.filteredSearchInput.removeEventListener('input', this.setDropdownWrapper);
       this.filteredSearchInput.removeEventListener('input', this.toggleClearSearchButtonWrapper);
       this.filteredSearchInput.removeEventListener('keydown', this.checkForEnterWrapper);
@@ -88,6 +91,11 @@
       this.dropdownManager.resetDropdowns();
     }
 
+    handleFormSubmit(e) {
+      e.preventDefault();
+      this.search();
+    }
+
     loadSearchParamsFromURL() {
       const params = gl.utils.getUrlParamsArray();
       const usernameParams = this.getUsernameParams();

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

@@ -17,7 +17,7 @@
             = icon('times')
           #js-dropdown-hint.dropdown-menu.hint-dropdown
             %ul{ 'data-dropdown' => true }
-              %li.filter-dropdown-item{ 'data-value' => '' }
+              %li.filter-dropdown-item{ 'data-action' => 'submit' }
                 %button.btn.btn-link
                   = icon('search')
                   %span