S allius/issue394 (#400)

* store logging path in Config class

* rename template files and page files

* jump to referer page

- after changing the language, we jump to
  the referer page, if the attribute exists

* build and send list of log-files

* rename Download page into Log files

* initialize log-path in test config

* improve dashboard unit tests

 - add log file tests
 - check content-languages after language switch

* initialize config structure for log-file tests

* add test log file to project

* add sub_dir to test log path

- non files must be skipped. To test this we add
  a sub directory to the test log directory

* add german translations

* set quart debug flag for debug versions

* update changelog

app/src/web/templates/page_index.html.j2

@@ -0,0 +1,57 @@
+{% extends 'base.html.j2' %}
+
+{% block title %} TSUN Proxy - Connections {% endblock title%}
+{% block menu1_class %}w3-blue{% endblock %}
+{% block headline %}<i class="fa fa-network-wired"></i>  {{_('Proxy Connection Overview')}}{% endblock headline %}
+
+{% block content %}
+  <div class="w3-row-padding w3-margin-bottom">
+    <div class="w3-quarter">
+      <div class="w3-container w3-indigo w3-padding-16">
+        <div class="w3-left"><i class="fa fa-upload w3-xxxlarge fa-rotate-180"></i></div>
+        <div id = "server-cnt" class="w3-right">
+          <h3>-</h3>
+        </div>
+        <div class="w3-clear"></div>
+        <h4>{{_('Server Mode')}}</h4>
+        <div class="w3-hide-small w3-hide-medium" style="min-height:50px">{{_('Established from device to proxy')}}</div>
+      </div>
+    </div>
+    <div class="w3-quarter">
+      <div class="w3-container w3-purple w3-padding-16">
+        <div class="w3-left"><i class="fa fa-download w3-xxxlarge fa-rotate-180"></i></div>
+        <div id = "client-cnt" class="w3-right">
+          <h3>-</h3>
+        </div>
+        <div class="w3-clear"></div>
+        <h4>{{_('Client Mode')}}</h4>
+        <div class="w3-hide-small w3-hide-medium" style="min-height:50px">{{_('Established from proxy to device')}}</div>
+      </div>
+    </div>
+    <div class="w3-quarter">
+      <div class="w3-container w3-orange w3-text-white w3-padding-16">
+        <div class="w3-left"><i class="fa fa-cloud w3-xxxlarge"></i></div>
+        <div id = "proxy-cnt" class="w3-right">
+          <h3>-</h3>
+        </div>
+        <div class="w3-clear"></div>
+        <h4>{{_('Proxy Mode')}}</h4>
+        <div class="w3-hide-small w3-hide-medium" style="min-height:50px">{{_('Forwarding data to cloud')}}</div>
+      </div>
+    </div>
+    <div class="w3-quarter">
+      <div class="w3-container w3-teal w3-padding-16">
+        <div class="w3-left"><i class="fa fa-cloud-arrow-up-alt w3-xxxlarge"></i></div>
+        <div id = "emulation-cnt" class="w3-right">
+          <h3>-</h3>
+        </div>
+        <div class="w3-clear"></div>
+        <h4>{{_('Emu Mode')}}</h4>
+        <div class="w3-hide-small w3-hide-medium" style="min-height:50px">{{_('Emulation sends data to cloud')}}</div>
+      </div>
+    </div>
+  </div>
+
+  <div class="w3-container" id="notes-list"></div>
+  <div class="w3-container" id="conn-table"></div>
+{% endblock content%}