The openPopup function was declared in AppMain
and used via dynamic scoping in many places in the
application. Moved function to Global component
and updated all places to call it via Global instead.
Closes#4267
Introduced Style.svg() Style.png() Style.emoji() and
Style.icon() in Style.qml. Those should be used to
set the source in Images instead of using relative
paths. Usage:
Image {
source: Style.svg("check)
....
Also moved all Singletons inside a new "utils"
folder and made it a QML module, to use
import utils 1.0 instead of relative paths
Closes#3678
