Metal Look and Feel

To ensure cross-platform consistency, the Look and Feel (LAF) of the FBEditor has been restricted to the Java "Metal" CrossPlatformLookAndFeel. Accordingly, the "lookAndFeel" entry in the Preferences dialog has been removed. This has been checked in both Windows 8.1 with the Oracle Java 7 runtime, and Ubuntu 14.04 LTS with the openjdk7 runtime. It has also been checked with the Java applets used in the FB Navigator in both Google Chrome on Windows 8.1 and Firefox with the icedTea plug-in on Ubuntu 14.04 LTS.