Add an escape command for modern display mode

ui/command-processor.go

@@ -113,6 +113,7 @@ func NewCommandProcessor(parent *MainView) *CommandProcessor {
 			"cs":         {"cross-signing"},
 			"power":      {"powerlevel"},
 			"pl":         {"powerlevel"},
+			"esc":        {"escape"},
 		},
 		autocompleters: map[string]CommandAutocompleter{
 			"devices":       autocompleteUser,
@@ -181,6 +182,8 @@ func NewCommandProcessor(parent *MainView) *CommandProcessor {
 
 			"rainbownotice": cmdRainbowNotice,
 
+			"escape": cmdEscape,
+
 			"fingerprint":   cmdFingerprint,
 			"devices":       cmdDevices,
 			"verify-device": cmdVerifyDevice,

ui/commands.go

@@ -908,6 +908,19 @@ func cmdSetState(cmd *Command) {
 	}
 }
 
+func cmdEscape(cmd *Command) {
+	if cmd.Config.Preferences.DisplayMode != config.DisplayModeModern {
+		cmd.Reply("/escape can only be used in the modern display mode")
+		return
+	}
+	if cmd.MainView.rosterView.selected == nil || !cmd.MainView.rosterView.focused {
+		cmd.Reply("/escape is used to exit from an open room (no room opened)")
+		return
+	}
+	cmd.MainView.rosterView.focused = false
+	cmd.MainView.rosterView.selected = nil
+}
+
 type ToggleMessage interface {
 	Name() string
 	Format(state bool) string