[Web UI] Fix sidebar display problem

[Web UI] Fix format of time+ in the process list

[Web UI] Do not display additional data for cpu and mem plugins on small devices

[Web UI] Use limits to highlight the values

[Web UI] Highlight nice values

Remove useless method
Fix variable name of plugins

[Web UI] Regression with the CPU plugin: IOWait, IRQ, Steal do not displayed anymore

[Web UI] Fix system and IP infos

[Web UI] Order file systems by mount point 

[Web UI] Hide values when not available

[Web UI] Round load values

[Web UI] Order disk by name

[Web UI] Fix order of network interfaces

[Web UI] Fox conversion issue of bytes/bites

[Web UI] Remove decoration on processes which are not running

[Web UI] Fix question mark display instead of zero as nice level in process list