Revert "another attempt at flex-based feed tree"

This reverts commit e12a6ca540.

themes/light/dijit_basic.less

@@ -4,11 +4,11 @@
 		padding: 2px;
 	}
 
-	/*#feedTree {
+	#feedTree {
 		.dijitTreeContent .dijitInline {
 			vertical-align : baseline;
 		}
-	}*/
+	}
 
 	.dijitButton i.material-icons {
 		position: relative;
@@ -107,12 +107,6 @@
 	}
 
 	.dijitTree {
-		.dijitTreeRowFlex {
-			display : flex;
-			flex-direction : row;
-			align-items : center;
-		}
-
 		.dijitFolderClosed,
 		.dijitFolderOpened {
 			display : none;
@@ -132,10 +126,10 @@
 			color : white;
 		}
 
-		/*.dijitTreeRow .dijitTreeExpando {
+		.dijitTreeRow .dijitTreeExpando {
 			position : relative;
 			top : -2px;
-		}*/
+		}
 
 		.labelParam {
 			float: right;