Allow default gamemode in beatmap search

[Lyti4n]

It would be nice to be able to choose which gamemode maps show up by default rather than having to click the button every single time. I think it should be a setting in the settings menu

[cl8n]

kind of like #6016

[cl8n]

could also apply to keymodes, for mania

[2:08 PM]DemonLordYamiru: i find it annoying as a 4k main that i have to use "key=4" always when i switch to mania mode. just a extra step thats abit annoying