Merge branch 'terencehill/scoreboard_ui' into 'master'

Scoreboard UI and team selection

See merge request xonotic/xonotic-data.pk3dir!1027

diff --cc qcsrc/client/hud/panel/scoreboard.qc
Simple merge

diff --cc qcsrc/client/hud/panel/scoreboard.qh
Simple merge

diff --cc qcsrc/client/main.qc
Simple merge

diff --cc qcsrc/client/main.qh
Simple merge

diff --cc qcsrc/client/view.qc
Simple merge

diff --cc qcsrc/menu/xonotic/keybinder.qc
Simple merge

diff --cc qcsrc/server/client.qc
Simple merge

diff --cc qcsrc/server/command/cmd.qc
Simple merge