Button consistency

- Use .btn wherever we use .btn-clean

- No border on .btn-clean

h/static/styles/annotations.scss

@@ -58,6 +58,9 @@
 
   button {
     color: $gray-light;
+    font-weight: normal;
+    padding: 0 .125em;
+
     .annotation:hover & {
       color: $link-color;
     }

h/static/styles/forms.scss

@@ -235,13 +235,12 @@
 }
 
 .btn-clean {
+  border: none;
+
   &, &:focus, &:hover, &:active, &[disabled],
   &.js-hover, &.js-focus, &.js-active, &.js-disabled {
     @include box-shadow(none);
-    padding-left: 0;
-    padding-right: 0;
     background: none;
-    border-color: transparent;
   }
 
   &:focus, &:hover, &:active, &.js-hover, &.js-focus, &.js-active {

h/templates/client/annotation.html

@@ -159,12 +159,12 @@
     </div>
 
     <div class="annotation-actions" ng-if="!vm.editing && vm.annotation.id">
-      <button class="small btn-clean"
+      <button class="small btn btn-clean"
               ng-click="vm.reply()"
               ><i class="h-icon-reply btn-icon"></i>
         <span class="btn-text">Reply</span></button>
       <span class="share-dialog-wrapper">
-        <button class="small btn-clean"
+        <button class="small btn btn-clean"
                 ng-click="share($event)"
                 ><i class="h-icon-link btn-icon"></i>
           <span class="btn-text">Link</span></button>
@@ -176,12 +176,12 @@
           <input type="text" value="{{vm.annotationURI}}" readonly>
         </span>
       </span>
-      <button class="small btn-clean"
+      <button class="small btn btn-clean"
               ng-show="vm.authorize('update')"
               ng-click="vm.edit()"
               ><i class="h-icon-edit btn-icon"></i>
         <span class="btn-text">Edit</span></button>
-      <button class="small btn-clean"
+      <button class="small btn btn-clean"
               ng-show="vm.authorize('delete')"
               ng-click="vm.delete()"
               ><i class="h-icon-delete btn-icon"></i>