Issue when display sensors with space in browser

[nicolargo]

Related to #1289 (comment)

[nicolargo]

There is also an error if the sensor name contains a space.

Ex: columns=system:hr_name,load:min5,cpu:total,mem:percent,memswap:percent,sensors:value:Ambient 2

venv/bin/python -m glances -C conf/glances.conf --browser
Exception in thread Thread-4 (__update_stats):
Traceback (most recent call last):
  File "/usr/lib/python3.12/threading.py", line 1073, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.12/threading.py", line 1010, in run
    self._target(*self._args, **self._kwargs)
  File "/home/nicolargo/dev/glances/glances/servers_list.py", line 149, in __update_stats
    self.__update_stats_rest(f'{server['uri']}/api/{__apiversion__}', server)
  File "/home/nicolargo/dev/glances/glances/servers_list.py", line 221, in __update_stats_rest
    server[server_key] = r.json()[column['field']]
                         ~~~~~~~~^^^^^^^^^^^^^^^^^
KeyError: 'value'

[nicolargo]

Corrected for both '_' and space chars in the develop branch.

Will be release in Glances 4.3.