bugfix: button mako widgets did not take css class into account

pboard/pboard/templates/pod.mak

 <%def name="Button(piId, pbWithLabel, psButtonCssClass, psButtonTitle, psButtonIcon, psButtonLabel)" >
-  <button id='${piId}' type="button" class="btn" title="${psButtonTitle}"><i class="${psButtonIcon}"></i>${u'' if (pbWithLabel==False) else u' %s'%(psButtonLabel)}</button>
+  <button id='${piId}' type="button" class="${psButtonCssClass}" title="${psButtonTitle}"><i class="${psButtonIcon}"></i>${u'' if (pbWithLabel==False) else u' %s'%(psButtonLabel)}</button>
 </%def>
 
 <%def name="SaveButton(piId, pbWithLabel=False)" >
-  ${Button(piId, pbWithLabel, 'btn', _('Save'), 'icon-g-edit', _('Save'))}
+  ${Button(piId, pbWithLabel, 'btn btn-success', _('Save'), ' icon-g-ok-2 icon-g-white', _('Save'))}
 </%def>
 <%def name="EditButton(piId, pbWithLabel=False)" >
   ${Button(piId, pbWithLabel, 'btn', _('Edit'), 'icon-g-edit', _('Edit'))}
 </%def>
 <%def name='CancelButton(piId, pbWithLabel=False)'>
-  ${Button(piId, pbWithLabel, 'btn', _('Cancel'), 'icon-g-ban', _('Cancel'))}
+  ${Button(piId, pbWithLabel, 'btn ', _('Cancel'), 'icon-g-ban', _('Cancel'))}
 </%def>
 <%def name='AddButton(piId, pbWithLabel=False, psLabel=None)'>
   ${Button(piId, pbWithLabel, 'btn', psLabel or _('New'), 'icon-g-circle-plus', psLabel or _('New'))}