themes: load client side translations

Extend the theme headers to include the translation string scripts,
allowing client side code to translate strings without server side
support.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

themes/luci-theme-bootstrap/luasrc/view/themes/bootstrap/header.htm

@@ -167,6 +167,7 @@
 		<% if css then %>
 			<style title="text/css"><%= css %></style>
 		<% end -%>
+		<script src="<%=url('admin/translations', luci.i18n.context.lang)%><%# ?v=PKG_VERSION %>"></script>
 		<script src="<%=resource%>/cbi.js"></script>
 		<script src="<%=resource%>/xhr.js"></script>
 	</head>

themes/luci-theme-freifunk-generic/luasrc/view/themes/freifunk-generic/header.htm

@@ -81,6 +81,7 @@
 </style>
 <% end -%>
 <meta name="viewport" content="initial-scale=1.0" />
+<script type="text/javascript" src="<%=url('admin/translations', luci.i18n.context.lang)%><%# ?v=PKG_VERSION %>"></script>
 <script type="text/javascript" src="<%=resource%>/cbi.js"></script>
 <script type="text/javascript" src="<%=resource%>/xhr.js"></script>
 

themes/luci-theme-material/luasrc/view/themes/material/header.htm

@@ -207,6 +207,7 @@
 	<% if css then %>
 		<style title="text/css"><%= css %></style>
 	<% end -%>
+	<script src="<%=url('admin/translations', luci.i18n.context.lang)%><%# ?v=PKG_VERSION %>"></script>
 	<script src="<%=resource%>/cbi.js"></script>
 	<script src="<%=resource%>/xhr.js"></script>
 </head>

themes/luci-theme-openwrt/luasrc/view/themes/openwrt.org/header.htm

@@ -160,6 +160,7 @@
 <%= css %>
 </style>
 <% end -%>
+<script type="text/javascript" src="<%=url('admin/translations', luci.i18n.context.lang)%><%# ?v=PKG_VERSION %>"></script>
 <script type="text/javascript" src="<%=resource%>/cbi.js"></script>
 <script type="text/javascript" src="<%=resource%>/xhr.js"></script>
 <script type="text/javascript">//<![CDATA[