add iframe embed option fields

[bbbo]

on the configuration page, so users can set an iframe source (and optionally height and width),
see https://flowplayer.org/docs/embedding.html#iframe-embedding . The contents will go into the embed: config object, like

embed: {
// embed including quality selector
iframe: "//flowplayer.org/standalone/multires/drive-iframe.html",
width: "864px",
height: "364px" // 360 + 4 ! player height + room for slim timeline
}

If an iframe is set, also add the fullscreen options to the global configuration? ) @blacktrash any negative side effects?

/*
additional global configuration to handle fullscreen behaviour of embedded
iframes
*/
flowplayer.conf = {

// allow iframe go fullscreen
fullscreen: true,

// fullscreen from iframe on tablets
native_fullscreen: true

};

[phloxic]

Should not be needed with upcoming flowplayer 7; embed will always be iframe, and iframe will be responsive if neither height or width are given.
That includes a better handling of the slim timeline thing as well, because that does not apply to fixed-controls and no-toggle modifier classes (nevermind what will change in the design, may still have to be adapted).

[phloxic]

Also, at least in the current state, the config stuff is meant of the iframe source, which is usually not the player one sees on site?

[bbbo]

the embed option quoted above are for the player setup?

[phloxic]

native_fullscreen and fullscreen are normally only required for the iframe source.

[bbbo]

I think this is still needed as the standard embed iframe does not transport ad configurations for example