The big led will only light up when the device is ringing and when on a call

These settings can't be changed via the configuration file afterward.

Conflicts:
	plugins/xivo-snom/8.7.3.19/plugin-info

It doesn't help and is just confusing.

* the 7.5.5 firmware fix the UTF-8 character display problem
* also add support for the <Locale> parameter
* fix some stuff with SPA514G, add SPA512G

Ticket #4548.

Same behaviour as speeddial function key.

4.0.4 and 5.0.0 use the same 000000000000.cfg and common.cfg files, so
keep only one copy in the common directory. The previous common.cfg file
in the common directory was no more used since the removal of the 3.X
plugins..

Also, update the style to the same style used in base.tpl, i.e. flat.

Also, use the default "autoanswer" ring tone class.

They were only used by the xivo-polycom-3.1.6 and xivo-polycom-3.2.4B
plugin, which have been removed.