Create a FrameManager helper

[uuf6429]

This object should be managing all windows/iframes for Electron.

Purposes:

• keep track of frame names (including generating them whenever required)
• keep an up-to-date list of existing iframes/windows where each record has:
  • unique electron id
  • name (autogenerated whenever required)
  • debugger frameId maybe?
  • reference to the electron object
• exposes helpers to:
  • get window name from id
  • set window name by id
  • get object reference from id
  • get list of window names (important: order by creation time)
• maybe keep track of main browser window and current window/iframe