fix(tapis): rebrand UI migration as "to-v3"

tapisproject_cms/src/taccsite_cms/templates/assets_custom.html

@@ -19,4 +19,4 @@
 {# NEW CODE #}
 
 <!-- To style old CMS content on new CMS -->
-<link rel="stylesheet" href="{% static 'tapisproject_cms/css/migrate.v1_v2.css' %}">
+<link rel="stylesheet" href="{% static 'tapisproject_cms/css/migrate.v1_v3.css' %}">

tapisproject_cms/src/taccsite_custom/tapisproject_cms/static/tapisproject_cms/css/migrate.to-v3.css

@@ -0,0 +1,12 @@
+/* TAPIS upgrade to v3.11.4 revealed UI bugs.
+    The typical v1_v2 migration did not help;
+    the result was very different from prod.
+    So just fix major discrepencies found in:
+    https://confluence.tacc.utexas.edu/x/_YqkEQ */
+
+/* To restore font size of buttons (whose text appears ot small on TAPIS) */
+/* https://tapis-project.org/documentation/ */
+.btn {
+  /* FAQ: Bootstrap 1rem = browser default html 16px, but TACC sets html 10px */
+  font-size: 16px;
+}