Increase search limit to 250

We limit the number of returned search results for performance reasons,
but the current limit seems too low.

core/ui/SideBar.tid

@@ -14,7 +14,7 @@ title: $:/core/ui/SideBar
 
 <div class="tw-search-results">
 
-<$list filter="[!is[system]search{$:/temp/search}sort[title]limit[50]]" emptyMessage="//No results//"/>
+<$list filter="[!is[system]search{$:/temp/search}sort[title]limit[250]]" emptyMessage="//No results//"/>
 
 </div>