fix(app): add missing components

tests/ui/components/SearchBar/SearchBar.qml

+import QtQuick 2.5
+
+Text {
+    anchors.centerIn: parent
+    text: qsTr('helloWorld')
+}

tests/ui/views/main_window.qml

+import QtQuick 2.5
+import QtQuick.Controls 2.0
+import QtQuick.Layouts 1.3
+
+import "qrc:/ui/components/SearchBar"
+
+ApplicationWindow {
+    id: mainWindow
+    visible: true
+
+    header: ToolBar {
+        RowLayout {
+            anchors.fill: parent
+        }
+    }
+
+    footer: TabBar {
+
+    }
+
+    SearchBar {}
+}