Fix layout for Find-Replace dialog

Here is some code that fixes the layout problem in the Find-Replace Dialog.
I was able to test it on Linux and Windows 7.

![fixed-searchandreplace-gtk](https://cloud.githubusercontent.com/assets/418786/4952351/ea61cb1a-6672-11e4-95e1-4383b6fa75c3.jpeg)
This  is an image of the Linux GTK version, but the layout is consistent across various javax.swing Themes (Metal, Nimbus, GTK, Windows)

Someone else has to do the Mac-Test I don't have access to one