[11.0][UPD] base_tier_validation: roadmap.

* using similar approach to activities has already benn addressed.
* add a new point explaining review tooltip improvement possibilities.

base_tier_validation/README.rst

@@ -52,7 +52,10 @@ To configure this module, you need to:
 Known issues / Roadmap
 ======================
 
-* In odoo v11 it would be interesting to try to take advantage of ``mail.activity.mixin``.
+* It would be interesting to improve the current tooltip to display reviews
+  to make it responsible and more "Odoo-ish". For instance, to use a
+  widget capable to display a tree view as a drop-down without needing
+  to navigate to a new screen.
 
 Bug Tracker
 ===========

base_tier_validation/readme/ROADMAP.rst

@@ -1 +1,4 @@
-* In odoo v11 it would be interesting to try to take advantage of ``mail.activity.mixin``.
+* It would be interesting to improve the current tooltip to display reviews
+  to make it responsible and more "Odoo-ish". For instance, to use a
+  widget capable to display a tree view as a drop-down without needing
+  to navigate to a new screen.

base_tier_validation/static/description/index.html

@@ -400,7 +400,10 @@ functionality.</li>
 <div class="section" id="known-issues-roadmap">
 <h1><a class="toc-backref" href="#id2">Known issues / Roadmap</a></h1>
 <ul class="simple">
-<li>In odoo v11 it would be interesting to try to take advantage of <tt class="docutils literal">mail.activity.mixin</tt>.</li>
+<li>It would be interesting to improve the current tooltip to display reviews
+to make it responsible and more “Odoo-ish”. For instance, to use a
+widget capable to display a tree view as a drop-down without needing
+to navigate to a new screen.</li>
 </ul>
 </div>
 <div class="section" id="bug-tracker">