STORM-112 FIXED Fixed EOLs display as "squares" in expandable textboxes after resize.

This problem reproduced not only on minimize of certain floaters from description, but for all expandable textboxes after resizes.
It happened because of hideExpandText() call in LLTextBoxEx::reshape() that broke lineendings.

- Removed it from there so text expands now only when clicking "More" link- it's the only time when it should be shown, and
also doesn't have problem with breaking anything because of calling setTextBase() after it.