Added "wait" field in new task and edit task pages

Added UI control to set `wait` option in pa11y script. Updated test
cases.

[pa11y-dashboard issue
#127](https://github.com/springernature/pa11y-dashboard/issues/127)

route/new.js

@@ -42,6 +42,7 @@ function route(app) {
 			standard: req.body.standard,
 			ignore: req.body.ignore || [],
 			timeout: req.body.timeout,
+			wait: req.body.wait,
 			username: req.body.username,
 			password: req.body.password
 		};

route/task/edit.js

@@ -60,6 +60,7 @@ function route(app) {
 					task.name = req.body.name;
 					task.ignore = req.body.ignore;
 					task.timeout = req.body.timeout;
+					task.wait = req.body.wait;
 					task.username = req.body.username;
 					task.password = req.body.password;
 					var standards = getStandards().map(function(standard) {

test/integration/route/new.js

@@ -62,6 +62,13 @@ describe('GET /new', function() {
 			assert.strictEqual(field.getAttribute('value'), '');
 		});
 
+		it('should have a "wait" field', function() {
+			var field = this.form.querySelectorAll('input[name=wait]')[0];
+			assert.isDefined(field);
+			assert.strictEqual(field.getAttribute('type'), 'text');
+			assert.strictEqual(field.getAttribute('value'), '');
+		});
+
 		it('should have a "username" field', function() {
 			var field = this.form.querySelectorAll('input[name=username]')[0];
 			assert.isDefined(field);

test/integration/route/task/edit.js

@@ -63,6 +63,13 @@ describe('GET /<task-id>/edit', function() {
 			assert.isDefined(field.getAttribute('disabled'));
 		});
 
+		it('should have a "wait" field', function() {
+			var field = this.form.querySelectorAll('input[name=wait]')[0];
+			assert.isDefined(field);
+			assert.strictEqual(field.getAttribute('type'), 'text');
+			assert.strictEqual(field.getAttribute('value'), '0');
+		});
+
 		it('should have a disabled "standard" field', function() {
 			var field = this.form.querySelectorAll('select[name=standard]')[0];
 			assert.isDefined(field);

view/new.html

@@ -74,6 +74,16 @@ along with pa11y-dashboard.  If not, see <http://www.gnu.org/licenses/>.
 		</div>
 	</div>
 
+	<div class="form-group clearfix">
+		<div class="row">
+			<div class="col-md-4 col-sm-4 col-xs-6">
+				<label class="control-label" for="new-task-wait">Wait (milliseconds)</label>
+				<input class="form-control" id="new-task-wait" type="text" placeholder="E.g. 3000" name="wait" value="{{task.wait}}"/>
+				<em>(Note: default wait time is 0ms)</em>
+			</div>
+		</div>
+	</div>
+
 	<div class="form-group clearfix">
 		<div class="row">
 			<div class="col-md-4 col-sm-4 col-xs-6">

view/task/edit.html

@@ -86,6 +86,16 @@ along with pa11y-dashboard.  If not, see <http://www.gnu.org/licenses/>.
 		</div>
 	</div>
 
+	<div class="form-group clearfix">
+		<div class="row">
+			<div class="col-md-4 col-sm-4 col-xs-6">
+				<label class="control-label" for="new-task-wait">Wait (milliseconds)</label>
+				<input class="form-control" id="new-task-wait" type="text" placeholder="E.g. 3000" name="wait" value="{{task.wait}}"/>
+				<em>(Note: default wait time is 0ms)</em>
+			</div>
+		</div>
+	</div>
+
 	<div class="form-group clearfix">
 		<div class="row">
 			<div class="col-md-4 col-sm-4 col-xs-6">