Log Message:
Update meld to 3.15.1:

2015-12-15 meld 3.15.1
======================

  Features:

   * Text ignored by filters is now dimmed to give some visual feedback that
     it's being ignored (David Rabel)
   * Text filters now apply independently, improving consistency; note that
     this is a behaviour change as filter order no longer matters, and filters
     will always apply to the original (not the filtered) text (David Rabel,
     Kai Willadsen)
   * Recent menu items now show more detail in tooltips (Alan Suran)
   * Update dialog action area layout for GTK+ theme changes (Kai Willadsen)

  Fixes:

   * Conflict resolution prompt now resolves properly again (Andrew Sutherland)
   * Silence some GTK+ assertions on window close (Zain)
   * Fix default filter issues from recent rework (Erik Schilling)
   * Percent-containing commit messages no longer corrupt our recent commit
     messages store (Kai Willadsen)
   * Fix some problems with unicode user directories on Windows (Kai Willadsen)
   * Fix encoding issues when saving files with load errors (Kai Willadsen)
   * Fix drawing corruption when scrolling horizontally (Kai Willadsen)
   * Fix clicking on the diffmap scrolling to the wrong location (Kai Willadsen)
   * Fix off-by-one drawing error for final line in file (Kai Willadsen)
   * Fix introspection requires to silence startup warnings (Kai Willadsen)
   * Fix clearing syncpoints (Kai Willadsen)
   * Add manual appdata kudos markers (Kai Willadsen)
   * PEP8 fixes (David Rabel, Kai Willadsen)

  Translations:

   * Daniel Mustieles (es)
   * Marek Černocký (cs)
   * Milo Casagrande (it)
   * Pedro Albuquerque (pt)
   * Piotr Drąg (pl)
   * Rafael Fontenelle (pt_BR)