[Web UI] Highlight nice values

[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

Fix MANIFEST for the web UI

[Web UI] Fix formatting of date/time in Alert plugin

[Web UI] Fix process list when no I/O