Correctly align annotation content in horizontal scrolling mode

Not only was long text in popups no longer wrapped correctly, the
alignment was also center instead of left (or right, depending on the
locale used) for both text in popups and the other parts within the
annotation's section, such as the icon.

web/annotation_layer_builder.css

@@ -15,6 +15,7 @@
 
 .annotationLayer section {
   position: absolute;
+  text-align: initial;
 }
 
 .annotationLayer .linkAnnotation > a,
@@ -165,6 +166,7 @@
   cursor: pointer;
   font: message-box;
   font-size: 9px;
+  white-space: normal;
   word-wrap: break-word;
 }