feature idea: save/restore presets

[se6astian-pi]

it would be cool if the webui feature a kind of preset (save/load) system to set/restore multiple parameters
or maybe also like the dashboard where you copy text blocks into a field to set multiple parameters?

it would not make sense to always save/restore all registers though I believe (just the selected ones) as otherwise the exposure time would always be altered when setting a preset

[se6astian-pi]

To make the idea more concrete:

• a new "presets" page like the new "commands" page bandit added.

• On that presets page you can add , edit or remove buttons, each button is one preset.

• each preset is a text that contains a list of parameters to set to certain values, like the dashboard.yml defines I elements.

• presets should be persistently saved to the camera

• some scripting/logic inside the presets text would be cool (lua was mentioned IIRC) so to be able to set PLR kneepoint 1 exposure time to 50% of actual exposure time for example.