[Core] Support Qt5-specific QML installation paths.
[Core] Use QML5 install path in GetSysPath().
[Core] Install core QML stuff into QML5 as well.
[SB2] Qt5-specific QML.
[SB2] Use QQuickWidgets on Qt5.
[SB2] No effects on Qt5.
[Core] Install UnhideListView for Qt5 as well.
[Util] Pass the model filler to UnhideListViewBase.
[HS] Qt5-compatible QML files.
[Core] Set QT_USE_QTDECLARATIVE for QuickWidgets as well.
[HS] Use new ctor.
[Core] Support finding Qwt built for Qt5.
[SB2] Tooltip declarative window.
[HS] Qt5 compatibility.