"type_=float" behaves a bit weirdly. Was kinda broken before, still not fully "fixed" here.
With this commit, if used together with convert_setter, it at least behaves in a sane way.
```
$ ./run_electrum -o setconfig timeout 10
1.16 | E | __main__ | error running command (without daemon)
Traceback (most recent call last):
File "/home/user/wspace/electrum/./run_electrum", line 593, in handle_cmd
result = fut.result()
File "/usr/lib/python3.10/concurrent/futures/_base.py", line 458, in result
return self.__get_result()
File "/usr/lib/python3.10/concurrent/futures/_base.py", line 403, in __get_result
raise self._exception
File "/home/user/wspace/electrum/./run_electrum", line 268, in run_offline_command
result = await func(*args, **kwargs)
File "/home/user/wspace/electrum/electrum/commands.py", line 194, in func_wrapper
return await func(*args, **kwargs)
File "/home/user/wspace/electrum/electrum/commands.py", line 408, in setconfig
self._setconfig(key, value)
File "/home/user/wspace/electrum/electrum/commands.py", line 398, in _setconfig
cv.set(value)
File "/home/user/wspace/electrum/electrum/simple_config.py", line 126, in set
self._config_var._set_config_value(self._config, value, save=save)
File "/home/user/wspace/electrum/electrum/simple_config.py", line 89, in _set_config_value
raise ValueError(
ValueError: ConfigVar.set type-check failed. key='timeout'. type=<class 'float'>. value=10
```
b590c864ee