OO-1688 fix line height problem in author name in course listing

src/main/webapp/static/themes/light/modules/_coursesite.scss

@@ -164,7 +164,7 @@
 				}
 				.o_author{
 					margin-top: 0.5em;
-					line-height: 1em;
+					line-height: normal;
 					font-size: 90%;
 					@include text-overflow();
 					color: $o-coursesite-meta-author-color;
@@ -173,7 +173,7 @@
 					position: absolute; 
 					top: 5px; right: 40px;
 					font-size: 90%;
-					line-height: 1em;
+					line-height: normal;
 					@include text-overflow();
 					color: $text-muted;
 					&.o_active {

src/main/webapp/static/themes/light/modules/_rating_and_comments.scss

@@ -13,7 +13,7 @@
 		.o_legend {
 			margin-left: 1em;
 			font-size: $font-size-small;		
-			line-height: 1em;
+			line-height: normal;
 		}
 		&.o_enabled {
 			.o_icon:hover {

src/main/webapp/static/themes/light/modules/_various_modules.scss

@@ -32,7 +32,7 @@ a.o_chelp {
 	position: relative;
 	float: right;
 	display: inline-block;
-	line-height: 1em;
+	line-height: normal;
 }
 
 /* iframe display controller - used to deliver all course contents */