oxygen-gtk2: Update to latest bugfix release 1.4.4
This update fixes the following issues with oxygen-gtk2:
- Update from version 1.4.0 to version 1.4.4 (no changelog provided from upstream)
+ fixes for kde#329112, kde#324438, kde#328495 and kde#325196.
+ bnc#867253: Fixed segfault in gnucash 2.6.2
- Submitted by Hrvoje Senjan (sumski)