Add an optional flag to prevent opening a new browser tab

[jeseibel]

Feature Request

Motivation Behind Feature

In order to view file changes you need to stop and restart the browser server; when that is done Cordova opens a new tab on the active browser, even if a tab is already open for the Cordova project.
Having to close the currently open tab each time the server is rebooted gets annoying.

Feature Description

Add a optional argument --no-launch which will start the server, but won't open a new browser window/tab.

Example:
cordova run browser --no-launch

Alternatives or Workarounds

Using cordova serve achieves this functionality; however, serve currently has an issue with loading plugins:

(The plugins work as expected when using cordova run browser or cordova run android.)