add retrying to Fyne window misdraw workaround on Linux

main.go

@@ -69,7 +69,16 @@ func main() {
 			if !inDelta(size, desired, 1) {
 				// window drawn at incorrect size on startup
 				scale := canvas.Scale()
+				for i := 0; i < 3 && !inDelta(size, desired, 1); i++ {
+					if i > 0 {
+						// if resize didn't work the first time, try again with slightly
+						// different desired size
+						desired.Subtract(fyne.NewSize(2, 2))
+					}
 					SendResizeToPID(os.Getpid(), int(desired.Width*scale), int(desired.Height*scale))
+					time.Sleep(100 * time.Millisecond)
+					size = canvas.Size()
+				}
 			}
 		}