(bug 56126) Inconsistent replying behavior

Added flow-creator on top of the reply text box; added container div (similar to
topic reply form); fixed some of the JS & CSS code to now target the container

Bug: 56126
Change-Id: Idb190445a664900bc20bbaf4e8fda9d9b5655a11
Merge "(bug 56126) Inconsistent replying behavior"