How to enable spell checking in Notepad++

I found a new hidden preference that disables continuous spell checking in most text views:

defaults write -g NSAllowContinuousSpellChecking -bool false

It prevents you from checking Edit > Spelling and Grammar > Check Spelling While Typing, but you can still use ⌘: and ⌘; to check spelling manually.

(I searched for potential preference keys with strings /System/Library/Frameworks/*.framework/Versions/Current/* /System/Library/Frameworks/*/Frameworks/*/Versions/Current/* 2> /dev/null | grep -i spell | grep -E '^[a-zA-Z0-9_.-]{10,80}$' | sort | uniq > ~/Desktop/strings.txt.)

According to http://www.opera.com/browser/tutorials/intro/speed/#spell:

For single line text fields, spell checking is not automatic, but you can enable it by right-clicking the field and checking Check spelling in the context menu.

If you want to spellcheck single-line textboxes, you could set the spellcheck attribute to true.

I have created a user JS that enforces the spellcheck attribute to true automatically.

Enable spellcheck:

https://gist.github.com/3154440/

Installing user JS:

1. Create a folder for storing user JS files.
2. Go to the user JS on GitHub > Right click on "raw" > Save Linked Content As... > Save the JS file to your user JS folder.
3. Opera > Settings > Preferences... > Advanced > Content > JavaScript Options... > Under "User JavaScript folder", select "Choose..." > Select the folder > OK > OK > OK.