- Update version to 5.6.19
* Add some UT
* Add UT for DComboBox
* Add ut_dpalettehelper
* DFontSizeManager tweak
* Add UT for DWaterMarkWidget
* Use DIconTheme::findQIcon
* Change DTK_STATIC_TRANSLATION to the default setting
* Fix bugs
- Update version to 5.6.19
* Add some UT
* Add UT for DComboBox
* Add ut_dpalettehelper
* DFontSizeManager tweak
* Add UT for DWaterMarkWidget
* Use DIconTheme::findQIcon
* Change DTK_STATIC_TRANSLATION to the default setting
* Fix bugs