Restart Firefox button in the Options dialog window(Continued):
- browser.preferences.instantApply 'supported'.
- default dialog buttons appearance restored.
- 'javascript.options.showInConsole' and 'enableconlog' preferences are linked.
- "XUL box for hbox element contained an inline #text child, forcing all its children to be wrapped in a block." fixed.


Signed-off-by: Rookie <Thierry@pb>