ui: tape/BackupOverview: increase timeout for media-set content

a single catalog can be over 100MiB, and a media-set can have multiple
catalogs to read (no technical upper limit). On slow disks, this can
take much longer than 30 seconds (the default timeout).

The real solution would be to have some kind of index only for the gui
relevant part, e.g. a table in the beginning of the catalog, or
alternatively a seperate file with that info. Until we have such a
solution increase the timeout as a stopgap.

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

www/tape/BackupOverview.js

@@ -125,6 +125,9 @@ Ext.define('PBS.TapeManagement.BackupOverview', {
 		let list = await Proxmox.Async.api2({
 		    method: 'GET',
 		    url: `/api2/extjs/tape/media/content`,
+		    // a big media-set with large catalogs can take a while to load
+		    // so we give a big (5min) timeout
+		    timeout: 5*60*1000,
 		    params: {
 			'media-set': media_set_uuid,
 		    },