Grey filter will be applied to the remote video/avatar displayed on
"large" and a message indicating remote connectivity issues will be
shown on top of that.

The 'wasVideoRendered' flag will tell whether or not we have any video
image rendered(even if stalled) on the large video element.

When the user is having connectivity issues we use the image cached in
the video element to show the preview in greyscale. It looks like this
cached image gets invalided after prolonged periods of time the video
element being hidden(and it is hidden when the video is muted). So we
never show this image if the user gets muted during connectivity
disruption in order to avoid blackness.

We used to rely on 'currentTime' of the video element, but we execute
'updateView' from the 'onplay' callback and on fast machines it may
happen that the value is 0 even though the video has just started.

At any point of time we display one of the three: video, avatar or
blackness. The purpose of this commit is to make that fact more clear
in the code.

The video or the avatar on a thumbnail will be displayed in greyscale
when the user is having connectivity issues.

Fix notification about network issues not displayed when expected

Fixes moderator related elements when everyone is moderator

fix(FilmStrip): Add check for thumbnails

rise-hand-ico: blured class added

Changes the state of room locker if room was locked not by current user.

Invite to share dialog

Makes sure we always resolve(call the callback) in feedback dialog.

Call the callback even when clicking outside the dialog, or escaping to close it.

Adds close page

When enabled after hanging up redirect to close page, if needed feedback will be displayed.

Moves handling of thank you dialog out of the Promise that handles the feedback and just before we redirect to welcome page.