Drop-Down Menu for channels #496
Description
Is your feature request related to a problem? Please describe.
#495 channel selection has a little issues to be fixed, but these could be done together with that.
Describe the solution you'd like
In the best case, the program would check, whenever you select a WiFi interface, which channels this interface may open APs on, as described in #495 especially in 5GHz this is quite limited. Then, in the dropdown menu, similar to the one where you select the interfaces, it would show the first working channel (which should also be the one automatically selected when having toggled off channel selection override) and when you click it, lets you scroll through all available channels. This would enable an improved user experience since it makes this step easier and doesnt need the user to research how channels work themselves.
As mentioned in #495 you should probably avoid radar-respecting channels overall, if you dont want to implement flexible automatic channel switching.
Describe alternatives you've considered
Maybe up and down buttons in the field to increase / decrease number.
Or a slider with the upper limit at the end and the lower limit at the beginning.
In order to find a fitting channel, users need to research themselves how to select a working channel and find out which work. I think it would be best to take this off them and just make the hard thing once, to make it easy for everyone at all following times.