add paramater to allow cache to be deleted or not when a refresh is done (you don't want to delete the cache on disk in the case of Symbian SDKs b/c
if the IDE quits abnormally the cache in memory is not written to disk.
<contexts>
<context id="hoverHelpContext">
<description>Hover Help Guide</description>
<topic href="resources/help context/dl_hover/html/getting_started.html" label="Overview"/>
<topic href="resources/help context/dl_hover/html/setup.html" label="Set Up"/>
<topic href="resources/help context/dl_hover/html/preferences.html" label="Preferences"/>
</context>
</contexts>