add infobox support

app/templates/common/macros.html

@@ -1,3 +1,5 @@
+{%- from 'common/icons.html' import icn_info, icn_warn, icn_error -%}
+
 {% macro timestamp(unix_ts) -%}
 <span class="timestamp" data-utc="{{ unix_ts }}">{{ unix_ts | ts_datetime('%Y-%m-%d %H:%M')}} <abbr title="Server Time">ST</abbr></span>
 {%- endmacro %}
@@ -180,3 +182,20 @@
   {%- endif -%}
 </div>
 {%- endmacro %}
+
+{% macro infobox(message, kind=InfoboxKind.INFO) -%}
+<div class="infobox plank top contain-svg horizontal {{InfoboxHTMLClass[kind]}}">
+  {%- if kind == InfoboxKind.INFO -%}
+  {{- icn_info() -}}
+  {%- elif kind == InfoboxKind.WARN -%}
+  {{- icn_warn() -}}
+  {%- elif kind == InfoboxKind.ERROR -%}
+  {{- icn_error() -}}
+  {%- endif -%}
+  {%- set m = message.split(';', maxsplit=1) -%}
+  <strong>{{m[0]}}</strong>
+  {%- if m[1] -%}
+  {{m[1]}}
+  {%- endif -%}
+</div>
+{%- endmacro %}