Add icon to Lademodus in standard_legacy theme

[jarus]

Just a small addition of an icon next to the "Lademodus" label in the standard_legacy theme to have a similar layout.

Sadly I found not better icon than the fa-charging-station like an icon showing some kind of mode selection.

[benderl]

Thanks for your PR. Unfortunately your chosen icon is already in use for the charging stations. Every symbol should be unique in its usage, so this is one not an option.

[jarus]

I fully understand that you want to keep the icon unique for the respective purpose.

How about associating the Lademodus with one of these two options; honestly both options are not ideal:

• gauge-simple; Beside a normal gauge showing a value, it could indicate a rotating switch to select something.
• diagram-next; Indicating how the load should be put into the battery of the EV.

[benderl]

"gauge-simple" looks like a thermometer for me, not really a gauge or switch.
For "diagram-next" I do not have any assiciation at all.

Some more suggestions:

• hexagon-nodes-bolt
  May represent a choice between different electricity related options/modes.
• diagram-project
  May also represent some kind of choice.
• microchip
  May represent some logic/algorithm.

[tpd-opitz]

I like these:

• sliders

• list-radio
  most intuitive for me

• toggle-on
  at least a switch

• dialpad
  not so intuitive in this context

[jarus]

Maybe it is now obvious why I do software development but no design full time.

In case my opinion matters, I would vote for:

• hexagon-nodes-bolt; not so obvious but after a quick look most users should also understand that you can switch between different modes. It is probably also a very unique icon with not so many possible locations/meanings and can be used everywhere for the charging mode
• list-radio; more generic but also clearly indicates that you can just choose one mode

[benderl]

Both symbols are ok for me. I would prefer the hexagon-nodes-bolt as it is more unique, but the generic list-radio seems more familiar. It is your choice @jarus