gEDA-dev: pcb feature request: Add a help button to the find dialog.

[Kai-Martin Knaak]

The find dialog can be extremely helpful during component placement. Its 
ability to do regexp searches is quite powerful, but hidden in the 
manual. Please expose this feature better with a help button that expands 
to a few examples. Would be handy for a quick look up of the required 
syntax. 

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Kai-Martin Knaak
http://lilalaser.de/blog