Description of problem:
When using plain text area for editor, it doesn't get autosize correctly when first loaded up.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Find a translation with more than 3 lines.
2. Uncheck "Use code mirror editor" in user option and save.
3. Refresh the page.
Text Area only shows 3 lines with scroll bar.
Text Area expend according to the length of the string.
VERIFIED with Zanata version 2.1-SNAPSHOT (20121129-1444)
Browser Firefox 16.0.2
and Google 22.0.1229.94