Help popover can be opened during the game

[Stefano Verzegnassi]

Load the game, and play.
If the user clicks the top-left corner, the help popover will be opened. This may be an issue if some falling blocks will be arranged behind the popover.

Solution:
Add "enabled: !flipable.flipped" to helpbutton MouseArea (as done for playbutton).

 Rectangle {
                    id: helpbutton
                    objectName: "introhelpbutton"
                    width: units.gu(5)
                    height: units.gu(5)
                    radius: units.gu(1)
                    Label {
                        objectName: "introhelplabel"
                        text: "?"
                        anchors.centerIn: parent
                    }
                    anchors.top: parent.top
                    anchors.right: parent.right
                    anchors.margins: units.gu(2)
                    MouseArea {
                        anchors.fill: parent
                        enabled: !flipable.flipped
                        onClicked: {
                            PopupUtils.open(helppop, helpbutton)
                        }
                    }
                }

[Ubuntu Phone Apps Jenkins Bot (ubuntu-phone-apps-jenkins-bot)]

Fix committed into lp:dropping-letters at revision 51, scheduled for release in dropping-letters, milestone Unknown