fixed overflow of projects column title

This fixes that titles of project columns can overflow and push the
action menu out of the card, so that interaction is no longer possible.

Fixes #3717

web_src/css/features/projects.css

@@ -39,6 +39,15 @@
   cursor: inherit;
 }
 
+.project-column-title-label {
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.project-column-header > .dropdown {
+  flex-shrink: 0;
+}
+
 .project-column > .cards {
   flex: 1;
   display: flex;