Translations:Release notes 0.19/20/en

Fixed issue with Std Part containers visibility when the viewport is displayed in full screen in Qt5:
 * Set for Qt 5.9 and above; forum discussion, commit 2a1dd8415, and commit 57b3ca6f77.
 * Disabled button support in  for Qt5 to avoid MDI view mode-related rendering artifacts; forum discussion, commit 960d612547.
 * Fixed bug in to avoid a crash when returning from full screen; forum discussion, commit c4e34ed9b.
 * Fixed issue #4088 about the visibility of the origin of a Part changing when undocking the 3D view; forum discussion, commit 1e19ef5be.
 * Fixed issue #3130 about Qt5 bugs when using a high resolution external monitor; forum discussion, commit 2f2d505359.