Fix request #6954 NO way to select value in some selectbox in my account page

 * Username preference
 * CSV date
 * CSV separator

Change-Id: I79e3ad6246cc6bdbf030b6cb6d40105b12a519cb
Merge commit 'refs/changes/07/2507/2' of ssh://gerrit.tuleap.net:29418/tuleap into HEAD

* ssh://gerrit.tuleap.net:29418/tuleap:
  Fix request #6954 NO way to select value in some selectbox in my account page

Change-Id: I714ae9292cfd5364be2e734cceecf4c3b4297d9b
This is Tuleap 7.0.99.53

Change-Id: If1cf38b4b5d086fea596ee4aa9f4cc672168a375