Signed-off-by: Stefan Priebe <s.priebe@profihost.ag>

New create_rrd_graph returns image data directly - no need to read from file.

Comment from Stefan: I've seen that it takes up to 10 cycles to have a
constant memory size. I think this is due to the fact that perls garbage
collection is not running every after each cycle.

Previos code creates the directory on the wrong node!

We cant use the ResourceStore, because it only contains VM accessable for
actual user.

Signed-off-by: tgrodzinski <t.grodzinski@profihost.ag>

We use double click to open the edit window, and this badly interact
with collapse/expand.

Seem that the bug only occur on my win7 installation, nowhere else.

Add dynamic updates, sort correctly.