feat: display edition on where is it modal

adds a record's edition to the modal that opens upon the 'Where is it?'
button being clicked on the search page.

For records that do not have edition information attached to them,
displays 'unknown' instead

code/web/interface/themes/responsive/GroupedWork/copyDetails.tpl

@@ -4,6 +4,7 @@
 		<thead>
 		<tr>
 			<th>{translate text="Available Copies" isPublicFacing=true}</th>
+			<th>{translate text="Edition" isPublicFacing=true}</th>
 			<th>{translate text="Location" isPublicFacing=true}</th>
 			<th>{translate text="Call #" isPublicFacing=true}</th>
 		</tr>
@@ -21,6 +22,13 @@
 				{else}
 					<td>{translate text="%1% of %2%" 1=$item.availableCopies 2=$item.totalCopies isPublicFacing=true}{if !empty($item.availableCopies)} <i class="fa fa-check"></i>{/if}</td>
 				{/if}
+				<td class="notranslate">
+					{if !empty($item.edition)}
+						{$item.edition}
+					{else}
+						{translate text='unknown' isPublicFacing=true}
+					{/if}
+				</td>
 				<td class="notranslate">{$item.shelfLocation}</td>
 				<td class="notranslate">
 					{if empty($item.isEContent)}