[vte] Created tag 0.52.3

[Christian Persch <chpe src gnome org>]

The unsigned tag '0.52.3' was created.

Tagger: Christian Persch <chpe src gnome org>
Date: 1554757937 +0200

    Version 0.52.3
    
    Git-EVTag-v0-SHA512: 
f87492f413415c893e588ea06d504019f430d1b1e50238ff0a50b436ae01b72901b0fcd930577952d9179281daac200d541973cfb150fc6eecbae6c8fa90c349

Changes since the last tag '0.52.2':

Akira Nakajima (1):
      ring: Fix thawing combining accents over a double-wide character

Christian Persch (2):
      Post release version bump
      widget: Prevent clipboard callbacks during destruction

Debarshi Ray (1):
      widget: Fix race between polling the master & using the PTY in a child

Egmont Koblinger (4):
      emulation: Fix upper coordinate limit for legacy mouse events
      widget: Fix URL recognition after dragging the scrollbar
      widget: Don't show the cursor occasionally over the scrollback data
      emulation: Do not encode keyboard modifiers in X10 mouse mode