Change fonts; make use of the new feature to allow fonts to be specified using property from dialog xml.
Ensure that all fonts are defined within the style.
algorithm (needed for the file selector and useful for other purposes, like
assembling lists of livery or screenshot files etc.)
- io.nas: move fixpath to string.nas (it's not only useful for file paths
but can also be used for property paths)
- screen.nas: move trim to string.nas (used by screen.nas and nasal-console.xml)
- gui.nas: add pattern matching to FileSelctor
- ufo.nas: use patterm matching (only *.ac and *.xml files shall be listed)
all code shares a common namespace, so variables defined in one tab can
be used in another during the whole fgfs session
- make code persistent (saved in autosave.xml)
- better error messages (code borrowed from nasal/lib/interactive.nas)
- clear button (replaces close button, which is now on the title bar)
- help button (explains how to add more tab buttons, etc.)
leave edit field!, press <Return> to execute; as an example try
screen.log.write("hello world"), or f16.canopy.open() in the F16,
or bo105.doors[3].move(0.3) in the Bo105 etc.