[Eric] hide Ui_* in list

[Carles Pina i Estany]

Hi again!

I have a project, with some files (this is fine) and some forms. Forms
generates Ui_ files in project. It would be user-friendly that user
could hide this files. 

I have not used directories in projects/forms, maybe one way to do it is
using directories? (I see a "Expand All Directories" and "Collapse All
Directories" options)

Thanks!

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Carles Pina i Estany		GPG id: 0x8CBDAE64
	http://pinux.info	Manresa - Barcelona