S allius/issue397 (#405)

* add Dashboards log handler to all known loggers

* add list of last 3 warnings/errors to page

* add note list to page

* create LogHandler for the dashboard

- simple memory log handler which stores the last
  64 warnings/errors for the dashboard

* render warnings/errors as note list

* add page for warnings and errors

* fix double defined build target

* add well done message if no errors in the logs

* translate page titles

* more translations

* add Notes page and table for important messages

* add unit tests

app/src/web/notes_list.py

@@ -0,0 +1,19 @@
+from quart import render_template
+from quart_babel import format_datetime
+
+from . import web
+from .log_handler import LogHandler
+
+
+@web.route('/notes-fetch')
+async def notes_fetch():
+    data = {
+        "update-time": format_datetime(format="medium"),
+    }
+
+    data["notes-list"] = await render_template(
+        'templ_notes_list.html.j2',
+        notes=LogHandler().get_buffer(),
+        hide_if_empty=False)
+
+    return data