replace overloaded class, minor style adjustments.

css/app.css

@@ -1270,15 +1270,15 @@ div.combobox {
     border-top-width: 1px;
 }
 
-.tag-row:first-child button.tag-help {
+.tag-row:first-child button.tag-help-button {
     border-top-right-radius: 4px;
 }
 
-.tag-row:last-child button.tag-help {
+.tag-row:last-child button.tag-help-button {
     border-bottom-right-radius: 4px;
 }
 
-.tag-row button.tag-help {
+.tag-row button.tag-help-button {
     right: -40px;
 }
 
@@ -1307,10 +1307,6 @@ div.combobox {
     position: relative;
 }
 
-.tag-help {
-    overflow: hidden;
-}
-
 .grid-pane .tag-reference-wrap {
     padding: 10px 0 20px 0;
 }
@@ -2293,10 +2289,10 @@ img.wiki-image {
     font-weight: bold;
     display: block;
     border-top: 1px solid #CCC;
-    margin-top: 20px;
+    margin-top: 10px;
     margin-left: -20px;
     margin-right: -20px;
-    padding: 20px 20px 0 20px;
+    padding: 10px 20px 0 20px;
 }
 
 .curtain-tooltip .tooltip-inner .bold:only-child {

js/id/ui/taglist.js

@@ -94,7 +94,7 @@ iD.ui.Taglist = function(context, entity) {
 
         row.append('button')
             .attr('tabindex', -1)
-            .attr('class', 'tag-help minor')
+            .attr('class', 'tag-help-button minor')
             .on('click', function(tag) {
                 tags.forEach(function(other) {
                     if (other.key === tag.key) {