Patch: Setup.exe - search for package

[Andrew Punch]

Hi,

I have attached a patch for searching packages in the package selection 
screen. The patch is against version 2.573.2.3 - I couldn't get the CVS 
head to build due to a libtool version problem.

The features of the patch are as follows:
* In the "Select Packages" screen I added a new edit box - the search 
edit box. The search edit box is to the left of the Keep/Prev/Curr/Exp 
and View elements
* As soon as the text in the search edit box changes - the list of 
packages is filtered
* If the package name contains the text in the search edit box - the 
package is displayed
* If the View is in "Category" mode - only categories containing 
matching packages will be displayed, when a category is expanded only 
matching packages are shown

Any suggestions are welcome.

-Andrew
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