qmlviewer and qmlscene is not used uniformly in UI panes

qmlviewer and qmlscene is used for quick 1 and quick 2 respectively. However, its usage as a QML previewer in creator can be confusing to a user.
For example,
in Preferences->Environment->External Tools, under Qt Quick, the preview tool is qmlviewer, whereas in Preferences->Build & Run->Qt Versions, Qt 5 mentions qmlviewer and qmlscene.

Also, if one tries to load Qt Quick 2 files with qmlviewer in Qt 5, qmlscene is launched (if the binary is found).