Getting ready for 1.2.0 release: many smaller requests implemented

- Implements #7
- Implements #42 and therefore #64
- Improved #53
- Implements #59
- Implements #61
- Implements #63
- Implements #80
- Implements #84
- Added Info page
- Removed Help page
- Bumped version number to 1.2.0
- Fixed a bug where wide mode was still 720px wide
- Created FUNDING.yml
- Reorganised arguments in README.MD and documented new options
- Updated SECURITY.MD
- Added display of last read time and read count
- Increased default width to 800px to make UI less cluttered
- Reorganised index page
- New, better attach file button

I want to spend some time testing these changes and let everyone have a look at them before tagging and releasing new artifacts.

templates/info.html

@@ -0,0 +1,42 @@
+{% include "header.html" %}
+
+<h2>Welcome to MicroBin</h2>
+<div style="height: 200px;">
+  <div style="float: left">
+    <h4>Links</h4>
+    <a href="https://docs.microbin.eu" style="margin-right: 1rem">Documentation and Help</a>
+    <br>
+    <a href="https://github.com/szabodanika/microbin" style="margin-right: 1rem">Source Code</a>
+    <br>
+    <a href="https://github.com/szabodanika/microbin/issues" style="margin-right: 1rem">Feedback</a>
+    <br>
+    <a href="microbin.eu/sponsor">Sponsor</a>
+  </div>
+
+  <div style="float: right">
+    <h4>Info</h4>
+    <table style="width: 400px">
+      <tr>
+        <td><b>Version</b></td>
+        <td>{{version_string}} </td>
+      </tr>
+      <tr>
+        <td><b>Status</b></td>
+        <td>{{status}} </td>
+      </tr>
+      <tr>
+        <td><b>Pastas</b></td>
+        <td>{{pastas.len()}} </td>
+      </tr>
+    </table>
+  </div>
+</div>
+
+{% if message != "" %}
+<h4>Messages</h4>
+<p>{{message}}</p>
+{%- endif %}
+
+<br>
+
+{% include "footer.html" %}