feat(ui-commands): Add command for hiding dialogs#229

JoVictorNunes wants to merge 2 commits intobigbluebutton:v0.0.xbigbluebutton/bigbluebutton-html-plugin-sdk:v0.0.xfrom

JoVictorNunes:media-dialogs-ui-commandJoVictorNunes/bigbluebutton-html-plugin-sdk:media-dialogs-ui-commandCopy head branch name to clipboard