slideshow: when presenter window is resized, slide is not

Now that the presenter window is an iframe, its no more able to trigger the
resize event so we need to attach it to the main window.

Signed-off-by: Marco Cecchetti <marco.cecchetti@collabora.com>
Change-Id: I208aa90fd52bfa956bd30eebd6e8cd03538776a1

browser/src/slideshow/SlideShowPresenter.ts

@@ -492,10 +492,7 @@ class SlideShowPresenter {
 		);
 		this._slideShowCanvas.focus();
 
-		this._slideShowWindowProxy.addEventListener(
-			'resize',
-			this.onSlideWindowResize.bind(this),
-		);
+		window.addEventListener('resize', this.onSlideWindowResize.bind(this));
 		this._getProxyDocumentNode().addEventListener(
 			'keydown',
 			this._onKeyDownHandler,
@@ -534,6 +531,7 @@ class SlideShowPresenter {
 		this._slideShowCanvas = null;
 		this._presenterContainer = null;
 		this._slideShowWindowProxy = null;
+		window.removeEventListener('resize', this.onSlideWindowResize.bind(this));
 		window.removeEventListener(
 			'beforeunload',
 			this.slideshowWindowCleanUp.bind(this),