Lower qt version used for emoji picker and scroll helper

resources/qml/ScrollHelper.qml

@@ -17,8 +17,8 @@
  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
-import QtQuick 2.12
-import QtQuick.Controls 2.12
+import QtQuick 2.9
+import QtQuick.Controls 2.3
 
 /*
 * Shamelessly stolen from:

resources/qml/emoji/EmojiPicker.qml

 import QtQuick 2.9
-import QtQuick.Controls 2.9
+import QtQuick.Controls 2.3
 import QtQuick.Layouts 1.3
-import QtGraphicalEffects 1.9
+import QtGraphicalEffects 1.0
 
 import im.nheko 1.0
 import im.nheko.EmojiModel 1.0