pkginfo: Fix flatpak description formatting.

Use html2text to convert the appstream description.

debian/control

@@ -15,6 +15,7 @@ Depends: python3,
          gir1.2-xapp-1.0,
          gir1.2-appstream-1.0,
          gir1.2-xmlb-2.0,
+         html2text,
          mint-translations,
          libgtk3-perl
          ${misc:Depends},

usr/lib/python3/dist-packages/mintcommon/installer/pkgInfo.py

@@ -1,3 +1,4 @@
+import html2text
 import sys
 if sys.version_info.major < 3:
     raise "python3 required"
@@ -372,10 +373,7 @@ def get_description(self, as_component=None):
             description = as_component.get_description()
 
             if description is not None:
-                description = description.replace("<p>", "").replace("</p>", "\n")
-                for tags in ["<ul>", "</ul>", "<li>", "</li>"]:
-                    description = description.replace(tags, "")
-                self.description = capitalize(description)
+                self.description = html2text.html2text(description)
 
         if self.description is None:
             return ""