Various changes. See description.

* Updated preferences user interface to add consistency between several user interface elements. Mainly, all elements now share the same 12 pt font size.
* Removed preference for batch log file writing. The behavior of this preference has never been consistent. It is best that it is gone.
* Added a new Advanced tab category in Preferences labeled “Incoming Data” — several existing preferences have been moved there.
* Added new preference under the Incoming Data category that blocks Zalgo Unicode spam. This preference is disabled by default.
* Moved preference to include user mode part of inline nicknames to the advanced tab of the style preferences.
Fix element disappearing when developer modes is disabled.
Add ability to clear log destination
Add new line type: dccfiletransfer
Use new log line type