[CODE] Change how program knows if it is currently running

Change the following mess found all over form1
```C#
if(labelRunning.text == "Running . . .") 
{
    this.button1.Text = "Stop";
    this.textBoxInterval.Enabled = false;
    this.buttonClear.Enabled = false;
}
```
or this
```C#
if(button1.text == "Start") 
```

to something way simpler