Remove the app.Draw() gorountine

Prefer to have widgets force a draw when their data changes. This should
reduce draws (unless the user has a module installed that updates >=
1/sec, the old draw default).

This should also remove a source of some of the race conditions that
users were experiencing (though not all, there are still many).

cryptoexchanges/blockfolio/widget.go

@@ -7,6 +7,7 @@ import (
 	"log"
 	"net/http"
 
+	"github.com/rivo/tview"
 	"github.com/senorprogrammer/wtf/wtf"
 )
 
@@ -16,9 +17,9 @@ type Widget struct {
 	device_token string
 }
 
-func NewWidget() *Widget {
+func NewWidget(app *tview.Application) *Widget {
 	widget := Widget{
-		TextWidget:   wtf.NewTextWidget(" Blockfolio ", "blockfolio", false),
+		TextWidget:   wtf.NewTextWidget(app, "Blockfolio", "blockfolio", false),
 		device_token: wtf.Config.UString("wtf.mods.blockfolio.device_token"),
 	}