Fix jEdit fonts for MacBook Pro with Retina display

From: https://bugs.eclipse.org/bugs/show_bug.cgi?id=382972#c4
Assumptions: jEdit was installed into /Applications directory.

1. Close any running jEdit
2. Edit /Applications/jEdit.app/Contents/Info.plist
1. At end of file, add the top two lines below above the bottom two lines, and save
3. Drag jEdit to desktop
4. Start jEdit and see if fonts fixed
5. If fixed, drag jEdit back to /Applications, and retest.

<key>NSHighResolutionCapable</key>
<true/>
</dict>
</plist>