Issues editing the EmailTo table in Configuration Editor

[lostcarpark]

When editing the EmailTo table in the Configuration Editor, I encountered two problems:

1. This is more of a user interface issue. When editing a Text field (currently the EmailTo table is the only table which has one), I didn't notice the "Save contents back to table" button on the editor, so the editor remained visible, and the Save button never got enabled, and I could not save changes. I propose changing the table editor so that the contents of the editor will be saved and the editor hidden if the user moves off the Text columns.
2. This one is a bug. When adding new rows to a table, the row is initialised with null values. The JS code tries to replace "\n" to a "br" tag, and fails because it is operating on a null value.

[lostcarpark]

My fixes for this are in the following branch:
https://github.com/olszowka/Zambia/tree/ConfigTableAddRowFix