macosx: Enable multiple selection on album supplementary detail view table view

Signed-off-by: Claudio Cambra <developer@claudiocambra.com>

modules/gui/macosx/UI/VLCLibraryCollectionViewAlbumSupplementaryDetailView.xib

@@ -144,7 +144,7 @@
                                         <rect key="frame" x="0.0" y="0.0" width="699" height="198"/>
                                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                         <subviews>
-                                            <tableView verticalHuggingPriority="750" allowsExpansionToolTips="YES" columnAutoresizingStyle="lastColumnOnly" tableStyle="fullWidth" columnReordering="NO" multipleSelection="NO" autosaveColumns="NO" rowHeight="50" viewBased="YES" id="eEJ-WA-0aM" customClass="VLCLibraryTableView">
+                                            <tableView verticalHuggingPriority="750" allowsExpansionToolTips="YES" columnAutoresizingStyle="lastColumnOnly" tableStyle="fullWidth" columnReordering="NO" autosaveColumns="NO" rowHeight="50" viewBased="YES" id="eEJ-WA-0aM" customClass="VLCLibraryTableView">
                                                 <rect key="frame" x="0.0" y="0.0" width="699" height="188"/>
                                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                                 <size key="intercellSpacing" width="3" height="2"/>