Add code to check for supported browser

[kcq888]

Add code to detect browser and display a dialog if non supported browser is detected. Currently, we only support the following browser.

1. Chrome
2. Safari
3. Edge

[fgrossman]

Actually we do not support Safari, we only support browsers that support Webserial. Here is the code to check for that, as there are some off brand browsers that support it.

// Check if browser can use WebSerial
if ("serial" in navigator) {
if(this.DEBUG_CONSOLE_ON) console.log("Serial supported in this browser!");

[kcq888]

Changed to use if (serial in navigator)