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Modify the file /atlassian-jira/secure/admin/user/views/userbrowser.jsp to get a UI 'SU' link. Find the following (around line 187 in JIRA 5.2):
Code Block <li><atype xml <td data-cell-type="operations">
<ul class="operations-list">
..<li><a id="su_link_<webwork:property value='name'/>" href="<ww:url page='JiraSU.jspa'><ww:param name="'name'" value='name' /></ww:url>">SU</A></li>
<li><a id="projectroles_link_<ww:propertyvalue="name"/>"
href="<ww:url
page="ViewUserProjectRoles!default.jspa"><ww:param
name="'name'"
value="name"
/><ww:param
name="'returnUrl'"
value="'UserBrowser.jspa'"
/></ww:url>"><ww:text
name="'common.words.project.roles'"/></a></li>
<ww:if test="/remoteUserPermittedToEditSelectedUser(.) == true">
...
</ul>
</td>
Pre-modified files:
For the time challenged, assuming no other customizations, copy the appropriate file to /atlassian-jira/secure/admin/user/views/userbrowser.jsp
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