Added:

• Brand new sidebar "Character Map" which offers traditional character map functionality.
  Note that this character map offers ALL Unicode characters, not just first plane.
  It is also searchable.
• Text search function can now wrap around.
• External tools now can just insert or replace selected text with their output.
• Fix *.lnk file handling on Windows. If user opens *.lnk pointing to file, then the
  target file is opened. Also, handling of linked folders is fixed with Qt's native
  open file dialog.
• New PHP-only lexer.

Changed:

• Added some more substyles for some lexers, updated substyles of
  built-in color schemes.
• "Markdown Preview" now uses md4c library (https://github.com/mity/md4c) which is more up-to-date.
• HTML lexer now handles HTML5 keywords.
• Scintilla is now directly incorporated into the source tree
  and its version is updated to 4.2.2.
• Persistent DateTime format setting for external tool. Setting is now changeable in
  "Settings" -> "Editor".
• DateTime tools now follow SYSTEM locale specifics.
• Some translations added or synced.
• Prebuilt Windows binaries now use update Qt library.