Multimedia: Dropped the fast froward and rewind buttons

Fixes (#5175)

src/i18n/base.js

@@ -73,8 +73,6 @@ wb.i18nDict = {
 	pause: "@pause@",
 	open: "@open@",
 	close: "@close@",
-	rew: "@rew@",
-	ffwd: "@ffwd@",
 	mute: {
 		on: "@mute-on@",
 		off: "@mute-off@"

src/plugins/multimedia/assets/mediacontrols.html

@@ -12,9 +12,7 @@
 
 		<div class="frstpnl">
 			<div class="btn-group">
-			<button type="button" class="btn btn-default rewind" aria-controls="{{mId}}" title="{{rewind}}" data-role="none"><span class="glyphicon glyphicon-backward"><span class="wb-inv">{{rewind}}</span></span></button>
 			<button type="button" class="btn btn-default playpause" aria-controls="{{mId}}" title="{{play}}" data-state-on="{{play}}" data-state-off="{{pause}}" data-role="none"><span class="glyphicon glyphicon-play"><span class="wb-inv">{{play}}</span></span></button>
-			<button type="button" class="btn btn-default fastforward" aria-controls="{{mId}}" title="{{ff}}" data-role="none"><span class="glyphicon glyphicon-forward"><span class="wb-inv">{{ff}}</span></span></button>
 			</div>
 		</div>
 

src/plugins/multimedia/multimedia.js

@@ -50,8 +50,6 @@ var pluginName = "wb-mltmd",
 			if ( !i18nText ) {
 				i18n = wb.i18n;
 				i18nText = {
-					rewind: i18n( "rew" ),
-					ff: i18n( "ffwd" ),
 					play: i18n( "play" ),
 					pause: i18n( "pause" ),
 					cc_on: i18n( "cc", "on" ),
@@ -768,7 +766,7 @@ $document.on( "click", selector, function( event ) {
 		return true;
 	}
 
-	// Opitmized multiple class tests to include child glyphicon because Safari was reporting the click event
+	// Optimized multiple class tests to include child glyphicon because Safari was reporting the click event
 	// from the child span not the parent button, forcing us to have to check for both elements
 	// JSPerf for multiple class matching http://jsperf.com/hasclass-vs-is-stackoverflow/7
 	if ( className.match( /playpause|-play|-pause|wb-mm-ovrly/ ) || $target.is( "object" ) ) {
@@ -801,11 +799,11 @@ $document.on( "keydown", selector, function( event ) {
 			break;
 
 		case 37:
-			$this.find( ctrls + " .rewind" ).trigger( "click" );
+			playerTarget.player( "setCurrentTime", this.player( "getCurrentTime" ) - this.player( "getDuration" ) * 0.05);
 			break;
 
 		case 39:
-			$this.find( ctrls + " .fastforward" ).trigger( "click" );
+			playerTarget.player( "setCurrentTime", this.player( "getCurrentTime" ) + this.player( "getDuration" ) * 0.05);
 			break;
 
 		case 38: