directory given a path, and to get top level analysis directory.

overlay/contrast. User only has to wait the first time that a cluster
grid is created.

performant. WidgetGrid related updates elsewhere.

bug-fixes in VolumeOpts.

to 'autoDisplay'. Made autoDisplay a DisplayContext property. Fixed bugs
in stat image auto display, and added support for rendered_thres_*
images.

default display settings for new overlays. Used by the addfile action,
the overlay list panel, and at startup via fsleyes_parseargs.

descriptions, and added a non-functional '--defaultDisplay' option.

properties. Code is much cleaner.

clippingRange symmetric about 0.

performance levels.

specified on the command line. Bugfix in OverlayPlotPanel - DataSeries
property listeners were not being de-registered in destroy().

unnecessary, as the Action object tracks opening/closing of control
panels, so can update its own state.

the action when it is invoked. OverlayDisplayToolBar no longer has a
settings button - the OverlayDisplayPanel is now accessed through the
view panel menu. Ortho/LightBoxToolBar no longer have a
'showMoreSettings' action - this is now on the CanvasPanel -
toggleCanvasSettingsPanel, and toggleDisplayPanel.

last commit to get a reference to a control panel, and then make sure
that bound widgets are updated when said control panel is
opened/closed. All @toggleActions now use this.

args decorators.

a different name if they use a built-in name, and is prompted to confirm
overwrite if they use the name of an existing (user-saved) perspective.

actions.__init__ module contains aliases for all the global Action
classes. FSLEyesFrame no longer stores a dict of {AuiPaneInfo :
ViewPanel} mappings, because AuiPaneInfo objects are evidently not
persistent, so I cannot use them as dict keys. New action -
ClearPerspectiveAction, which delets all user-saved
perspectives. SavePerspectiveAction is functional.  Perspectives module
is functional, but needs more work w.r.t. managing built-in
perspectives.

this. Some other minor fixes/tweaks.

added to all AuiManagers are now explicitly named, to make
restoring perspectives easier.

action to a toggle widget.

updated if a control panel is closed directly by the user, as opposed to
being closed by the ToggleAction. OrthoPanel no longer shows edit
toolbar by default.

decorator on a method) was shared between all instances of the class,
which was not ideal. Now, the tricksy ActionFactory creates an Action
instance for every target instance.

decorator design. Need to iron out some class-hierarchy related bugs.

decorator. New sub-class called ToggleAction, which does some
wx.MenuItem-specific stuff. ActionProvider class no longer derives
from SyncableHasProperties - sub-classes will have to explicitly inherit
from both. All the docs are wrong, and all the things are broken.

to resolutionLimit changes)

performance mode. Off-screen rendering on lightbox canvas is no longer
used, as it is rubbish. Furthermore, combining off-screen + pre-render
modes on lightbox canvas is actually slower than pre-rendering directly
to the screen!

in some circumstances, and were not calling GLObject.onUpdate when
transform property changed

four modes. Things are probably broken.

think). Also fixed that persistent VolumeOpts.__toggleListeners error -
DisplayOpts.destroy was not calling syncable.detachFromParent,  so
dangling references in DisplayOpts peers lists were being left.

horizontal space. And a couple of fixes/enhancements as well.

GLObject was being updated.