Use underscores in graph hook scripts

Underscores are translated to space for display in the GUI

emhttp/plugins/dynamix/DashStats.page

@@ -74,8 +74,8 @@ $dot = _var($display,'number','.,')[0];
 $zfs = count(array_filter(array_column($disks,'fsType'),function($fs){return str_replace('luks:','',$fs??'')=='zfs';}));
 
 // enable/disable graph elements by making hook script executable or not
-chmod("$docroot/webGui/system/VM usage",$libvirtd ? 0755 : 0644);
-chmod("$docroot/webGui/system/ZFS cache",$zfs ? 0755 : 0644);
+chmod("$docroot/webGui/system/VM_usage",$libvirtd ? 0755 : 0644);
+chmod("$docroot/webGui/system/ZFS_cache",$zfs ? 0755 : 0644);
 
 foreach ($disks as $disk) {
   switch (_var($disk,'type')) {

emhttp/plugins/dynamix/nchan/update_1

@@ -65,8 +65,8 @@ while (true) {
   foreach ($hooks as $hook) {
     $data = @intval(exec(escapeshellarg($hook)));
     if (!$data || $data>$used) continue;
-    $names[] = _(basename($hook)); // name of element (with translation)
-    $bytes[] = $data;              // value in bytes of element
+    $names[] = _(basename(str_replace('_',' ',$hook))); // name of element (with translation)
+    $bytes[] = $data;                                   // value in bytes of element
   }
   $services  = $used-array_sum($bytes);
   $meminfo[] = round(100*$used/$total)."%";