Bottom toolbar barely visible on Ubuntu

When launching Calico on Ubuntu (using Oracle's Java) the application window is too large, so the controls on the bottom are cut (you can use them only if you know what they are, they're not readable)

java version "1.7.0_25"
Java(TM) SE Runtime Environment (build 1.7.0_25-b15)
Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01, mixed mode)

Java(TM) Web Start 10.0.0.147-fcs
