Line wrapping

Steps to reproduce:

1. Keep typing. Go on. Keep going. Till you reach next line automatically.
2. Now press enter and start typing.
3. Look how beautifully the two lines are overlapping.

Line wrapping needs to be implemented. I guess browser is automatically wrapping it currently.

The implementation should be such that
- incomplete words should automatically be shifted to next line
- resizing the window should automatically change the wrapping. (or add a horizontal scrollbar).

Any better suggestions?

The issue names no files or tests. Start by reproducing the overlapping lines in the web source code editor and inspect the current wrapping behavior; it is done when long input wraps without overlap and resizing continues to wrap correctly or provides a horizontal scrollbar.

Written by the indexing model from the issue text.