ui: datastore/Content: add 'Prune All' button

since the api call always starts a real worker, we cannot have a
preview. It would also be very hard to show that for all groups in a
non-confusing way. We reuse the pbsPruneInputPanel and add the dry-run
field there conditionally.

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

www/window/DataStoreEdit.js

@@ -6,6 +6,9 @@ Ext.define('PBS.panel.PruneInputPanel', {
 
     onlineHelp: 'maintenance_pruning',
 
+    // show/hide dry-run field
+    dryrun: false,
+
     cbindData: function() {
 	let me = this;
 	me.isCreate = !!me.isCreate;
@@ -65,6 +68,18 @@ Ext.define('PBS.panel.PruneInputPanel', {
 	},
     ],
 
+    columnB: [
+	{
+	    xtype: 'proxmoxcheckbox',
+	    name: 'dry-run',
+	    fieldLabel: gettext('Dry Run'),
+	    cbind: {
+		hidden: '{!dryrun}',
+		disabled: '{!dryrun}',
+	    },
+	},
+    ],
+
 });
 Ext.define('PBS.DataStoreEdit', {
     extend: 'Proxmox.window.Edit',