Since we mutate the (cached) definition properties on each call to
clone(), we need to reset these values back, or the non-clone()-ed
instance gets confused paths to its input and list widgets.
https://sourceforge.net/p/flightgear/codetickets/2044/
Realistically 768 pixels is the minimum height for most displays these days, so 500 is a reasonable figure for all displays, and it does make it easier to operate.
"I've managed to fix this by differentiating rebuilding the 3D layers
(e.g. due to METAR updates) from rebuilding the entire environment (due to a
change in scenario)."
/me: property-browser.xml: drop a redundant line
but as this is an integral part of FlightGear, I don't want to push for it.
Try out and comment. It's available under "Debug/Property Browser". Note,
that this isn't the slow pure-Nasal implementation, but a regular dialog
using a c++ based widget. Only the handling is done in Nasal, so there should
really be not performance degradation compared with the old dialog.
Easter Eggs: some entries work differently when the Control-key is pressed:
"." -> toggle output of SGPropertyNode flags
".." -> go to root (not just one dir level)
bool entry -> toggle bool entry value
