ui: prune: fix sending invalid parameters

the prune input panel is used in various contexts (add/editing a
prunejob, adding a datastore, executing a prune). These different api
calls don't all take the same parameters, so we have to correctly set
the `isCreate` to not send a `delete` paramter for those request if
there was an empty field.

Also set 'max-depth:0' only when recursive was not set *and* we can
set 'recursive', because for creating a datastore that is not supported
by the api, and for the prune job editing we override the whole
onGetValues anyway so that's not an issue there.

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

www/datastore/Content.js

@@ -479,6 +479,7 @@ Ext.define('PBS.DataStoreContent', {
 			ns,
 			dryrun: true,
 			canRecurse: true,
+			isCreate: true,
 		    },
 		],
 	    });

www/panel/PrunePanel.js

@@ -27,7 +27,7 @@ Ext.define('PBS.panel.PruneInputPanel', {
 	if (me.ns && me.ns !== '') {
 	    values.ns = me.ns;
 	}
-	if (!values.recursive) {
+	if (!values.recursive && me.canRecurse) {
 	    values['max-depth'] = 0;
 	}
 	delete values.recursive;

www/window/PruneJobEdit.js

@@ -105,7 +105,9 @@ Ext.define('PBS.window.PruneJobEdit', {
 		xtype: 'pbsNamespaceMaxDepthReduced',
 		name: 'max-depth',
 		fieldLabel: gettext('Max. Depth'),
-		deleteEmpty: true,
+		cbind: {
+		    deleteEmpty: '{!isCreate}',
+		},
 	    },
 	],
 
@@ -133,6 +135,9 @@ Ext.define('PBS.window.PruneJobEdit', {
 	columnB: [
 	    {
 		xtype: 'pbsPruneInputPanel',
+		cbind: {
+		    isCreate: '{isCreate}',
+		},
 		getValues: () => ({}), // let that handle our inputpanel here
 	    },
 	    {