expcon action module

Called from any PIE screen, expands or contracts an item

action routine

Input: CGI data from UIG (which contains itemid and userid)
Output: Returns unmodified CGI data or CGI data with extra information about
last search made

PDL

Get expanded state of item from viewitem table (so as to only change what this
particular user sees)
Expanded = 1-expanded
Update viewitem table with new expanded value
If response parameter is "searchresults"
    (Need to ensure that search data is set)
    Get data about last search from userdata table
    Foreach search parameter
    	Set CGI parameter of same name
    Get list of resources searched from last_search_resources table
    Foreach resource
    	Append resource_id to resource CGI parameter
Return CGI data