workaround rendering speed issues in CodeMirror with very large scripts.
Fixes#4631.
Re-arrange editor options in the Preferences dialogue to tidy things up.
- Removed the "lineWrapping" option from the codemirror textarea because
it was creating issue in the code folding.
- Handle the values while depositing during debugging.
- Properly handle the Array values while saving it to sqlite database
and displayed in input dialog.
- SQL code folding was not supported in codemirror so added the same.
