Log Message:
Update to 6.3.0.4

* qt4 option is no longer provided

Changelog:
See: https://wiki.documentfoundation.org/ReleaseNotes/6.3 in detail

* Improve performances
* Improve file load an save performances in Writer
* Improve MS Office file supoort in Calc
* Use tabcompact UI by default
* Use context single mode for Writer and Draw
* Support PDF/A-2 export
* And many improvements and bugfixes