Remove unused argument from AutomatableButton

[allejok96]

This PR removes an unnecessary string argument from automatable buttons, resulting in shorter code and preventing meaningless translation work.

When I translated I discovered some strings that are not visible in the UI. It turns out that AutomatableButton, PixmapButton and LedCheckBox all require a name for their default constructed model. The string is displayed in the header of the right click context menu, but only if the button never gets connected to a real model. If that happens, the real model's name is used instead. 95% of buttons are connected to real models, and the 5% that aren't are probably not meant to be automated (eg not meant to be right clicked), so removing a header text from their context menu should be no big deal. You can see an example of this in the video. All button tooltips and labels remain untouched.

Skarminspelning.fran.2025-12-23.00-33-13.mp4