Fix assorted launch issues on Windows, Mac and Linux
BEAST:
o GUI version outputs log files in same directory as XML file
o added option to specify version.xml files explicitly.
BEAUti:
o Fix some BEAUti tooltip glitches, and BEAUti icon in Windows
o Remove AquaFX theme.
o Fix splash screen for BEAUti
o Add theming to Alert
o More responsive refresh + do not loose list view selection
Logcombiner converted to JavaFX
Applauncher: deal with superfluous icon not found messages
DocMaker functional again
EBSPanalyser converted to JavaFX
Clean up BEAST code and some BEAUti code
DensiTree update to v3.0.2, fixing a display bug on Apple Silicon
Update migration script for converting v2.6 packages to v2.7
