Wrap termenv altscreen functions to make things simpler for the end user

tea.go

@@ -269,3 +269,15 @@ func (p *Program) processSubs(msgs chan Msg, activeSubs subManager) subManager {
 
 	return activeSubs
 }
+
+// AltScreen exits the altscreen. Just is just a wrapper around the termenv
+// function
+func AltScreen() {
+	termenv.AltScreen()
+}
+
+// ExitAltScreen exits the altscreen. Just is just a wrapper around the termenv
+// function
+func ExitAltScreen() {
+	termenv.ExitAltScreen()
+}