fix(perf): [thinkingrock-gtd#76] Set default_cachedir to speed up sub…

…sequent starts of app

The default_cachedir is set to DEFAULT_CACHDIR_ROOT, which will be
in folder tr-4.0 within:

- Mac: "${HOME}/Library/Caches/trgtd"
- Linux: "${HOME}/.cache/trgtd/"

Not sure where it is on windows.

nbproject/trgtd.conf

@@ -1,3 +1,4 @@
 default_userdir="${HOME}/.thinkingrock/tr-4.0"
+default_cachedir="${DEFAULT_CACHEDIR_ROOT}/tr-4.0"
 
 default_options="--locale en:UK --branding trgtd -J-client -J-Xss4m -J-Xms64m -J-Dsun.java2d.noddraw=true -J-Dsun.java2d.dpiaware=true -J-Dsun.zip.disableMemoryMapping=true -J--add-opens=java.base/java.security=ALL-UNNAMED -J--add-opens=java.base/java.lang=ALL-UNNAMED -J--add-opens=java.desktop/javax.swing=ALL-UNNAMED -J--add-opens=java.desktop/sun.awt=ALL-UNNAMED -J--add-opens=java.desktop/java.awt.font=ALL-UNNAMED -J--add-opens=java.base/java.text=ALL-UNNAMED -J--add-opens=java.base/java.lang.reflect=ALL-UNNAMED -J--add-opens=java.base/java.util=ALL-UNNAMED -J--add-opens=java.base/java.net=ALL-UNNAMED"