[TF2] Make voting nextlevel actually usable

[nshopik]

Currently if you want use sv_vote_issue_nextlevel_choicesmode, you have to enable sv_vote_issue_nextlevel_allowed cvar, which is not always preferable for server ops. Still you run into 2 issues:

• list of 5 maps only appears when 2 minutes remaning or how much round left. This is not working on most PL/PLR maps as these mostly end before 2 minutes left (server end map if there is less 5 mins left for next round) and you can't relay on mp_winlimit on them
• There is no run off vote, if there is not enough players voted for 1 map.

This will make voting for nextmap actually usable in vanilla TF2, if it will appear when there 10 minutes left and there is run off vote for 2 max voted maps, to choice max voted for. Allow sv_vote_issue_nextlevel_choicesmode w/o sv_vote_issue_nextlevel_allowed

[powerlord]

Incidentally, issues like this are why the NativeVotes SourceMod plugin exists: It allows 3rd party voting plugin to use the Valve voting screens, such as Ultimate MapChooser (via a module), MapChooser Extended, and a port of the standard SourceMod 1.5 MapChooser.

[nshopik]

Sure thing, we are using your NativeVotes plugin and MapChoiser Extended. We just prefer to use minimum as possible sourcemod plugins if it possible. Especially if we don't need really fancy stuff, but more like basic