Distinguishes between search inputs.

Main search input has different styles than secondary search inputs.

app/assets/stylesheets/framework/forms.scss

@@ -12,26 +12,26 @@ input[type='search'].search-text-input {
   background-position: 10px;
   background-size: 16px;
   background-position-x: 30%;
-  padding-left: 25px;
+  padding-left: 10px;
   background-color: $gray-light;
 
-  &[value=""] {
+  &.search-input[value=""] {
     background-image: url('data:image/png;base64,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');
   }
 
-  &::-webkit-input-placeholder {
+  &.search-input::-webkit-input-placeholder {
     text-align: center;
   }
 
-  &:-moz-placeholder { /* Firefox 18- */
+  &.search-input:-moz-placeholder { /* Firefox 18- */
     text-align: center;  
   }
 
-  &::-moz-placeholder {  /* Firefox 19+ */
+  &.search-input::-moz-placeholder {  /* Firefox 19+ */
     text-align: center;  
   }
 
-  &:-ms-input-placeholder {  
+  &.search-input:-ms-input-placeholder {  
     text-align: center; 
   }
 }

app/views/shared/issuable/_search_form.html.haml

 = form_tag(path, method: :get, id: "issue_search_form", class: 'pull-left issue-search-form') do
   .append-right-10.hidden-xs.hidden-sm
-    = search_field_tag :issue_search, params[:issue_search], { placeholder: 'Filter', class: 'form-control issue_search search-text-input', spellcheck: false }
+    = search_field_tag :issue_search, params[:issue_search], { placeholder: 'Filter by name ...', class: 'form-control issue_search search-text-input', spellcheck: false }
     = hidden_field_tag :state, params['state']
     = hidden_field_tag :scope, params['scope']
     = hidden_field_tag :assignee_id, params['assignee_id']