Always on top hint is not appropriate for the
chart settings since the LTM chart settings
open another dialog -- which then appear behind
the dialog and cannot be moved.
Fixes#401.
If you press ESC on the chart settings (not add chart) dialog
then the dialog is closed and deleted, causing a SEGV. This
patch overrides reject() to ensure the dialog is just hidden.
The chart settings are no longer in the side bar and can be selected
from a drop down menu on the chart. This works in tiled and tabbed
mode and allows for further enhancements e.g. custom menu options
for commonly use config options (ala Android).
This is part of a series of updates to migrate away from a sidebar
that is a toolbox of ridelist etc and move back towards a context
sensitive sidebar.
