jp: jp asyncio port:

/!\ this commit is huge. Jp is temporarily not working with `dbus` bridge /!\

This patch implements the port of jp to asyncio, so it is now correctly using the bridge
asynchronously, and it can be used with bridges like `pb`. This also simplify the code,
notably for things which were previously implemented with many callbacks (like pagination
with RSM).

During the process, some behaviours have been modified/fixed, in jp and backends, check
diff for details.

sat/plugins/plugin_misc_text_syntaxes.py

@@ -348,9 +348,8 @@ class TextSyntaxes(object):
                     element.text = ''
         return html.tostring(xhtml_elt, encoding=str, method="xml")
 
-    def convert(
-        self, text, syntax_from, syntax_to=_SYNTAX_XHTML, safe=True, profile=None
-    ):
+    def convert(self, text, syntax_from, syntax_to=_SYNTAX_XHTML, safe=True,
+                profile=None):
         """Convert a text between two syntaxes
 
         @param text: text to convert