info widget: set default warning threshold to 75%

60% is just way to low, this probably could be 80% or even 85% too,
in huge setups that normally means that there's still a lot of
resources left, but be conservative for now.

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

src/panel/InfoWidget.js

@@ -40,7 +40,7 @@ Ext.define('Proxmox.widget.Info', {
 	},
     ],
 
-    warningThreshold: 0.6,
+    warningThreshold: 0.75,
     criticalThreshold: 0.9,
 
     setPrintBar: function(enable) {