Gutyán Gábor / circlestack

also fix add a hash function to check whether we should
update the activity feed

Closes #230

VM resources sliders

✅ new sliders from VM detail
✅ new sliders from VM customized create
✅  configurable max node ram
✅ server side max node ram check
✅ new sliders for template edit/create

https://miskolc.cloud.bme.hu:18525/dashboard/

Closes #183
Closes #137

- some leftover comment/hr
- also those margins made the boxes on index jump ...

without the load the sliders weren't set, but clicking on customize
would load the js again and that would attach the click event twice

fix typo
handle NoStoreException (this shouldn't really happen)

* renaming to __ prevent makemessages catching it
* non-lazy version would never work here