Wizards: Add "Qt 5.7" option to QtQuick[.Controls] wizard

With updated import versions.

Change-Id: I9c69373d31c7e434eb7b9c210606a79be3d1566e
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

share/qtcreator/templates/wizards/projects/qmake/qtquickapplication/wizard.json

@@ -43,6 +43,14 @@
                         "index": 2,
                         "items":
                         [
+                            {
+                                "trKey": "Qt 5.7",
+                                "value":
+                                "{
+                                    'qtQuickVersion': '2.7',
+                                    'qtQuickWindowVersion': '2.2'
+                                }"
+                            },
                             {
                                 "trKey": "Qt 5.6",
                                 "value":

share/qtcreator/templates/wizards/projects/qmake/qtquickcontrolsapplication/wizard.json

@@ -45,6 +45,16 @@
                         "index": 2,
                         "items":
                         [
+                            {
+                                "trKey": "Qt 5.7",
+                                "value":
+                                "{
+                                    'qtQuickVersion': '2.7',
+                                    'qtQuickControlsVersion': '1.5',
+                                    'qtQuickDialogsVersion': '1.2',
+                                    'qtQuickLayoutsVersion': '1.3'
+                                }"
+                            },
                             {
                                 "trKey": "Qt 5.6",
                                 "value":