[Gambas-bugtracker] Bug #1964: Frame borders are shown when using qt5

[bugtracker at gambaswiki.org]

http://gambaswiki.org/bugtracker/edit?object=BUG.1964&from=L21haW4-

Charlie REINL reported a new bug.

Summary
-------

Frame borders are shown when using qt5

Type             : Bug
Priority         : Medium
Gambas version   : Master
Product          : Development Environment


Description
-----------

Frame borders are shown when using qt5 was not with qt4


System information
------------------

[System]
Gambas=3.15.90 bc2b59468 (master)
OperatingSystem=Linux
Kernel=5.4.0-53-generic
Architecture=x86_64
Distribution=Ubuntu 20.04.1 LTS
Desktop=MATE
Theme=fusion
Language=de_DE.UTF-8
Memory=3908M

[Libraries]
Cairo=libcairo.so.2.11600.0
Curl=libcurl.so.4.6.0
DBus=libdbus-1.so.3.19.11
GDK2=libgdk-x11-2.0.so.0.2400.32
GDK3=libgdk-3.so.0.2404.16
GStreamer=libgstreamer-1.0.so.0.1602.0
GTK+2=libgtk-x11-2.0.so.0.2400.32
GTK+3=libgtk-3.so.0.2404.16
OpenGL=libGL.so.1.7.0
Poppler=libpoppler.so.73.0.0
Poppler=libpoppler.so.97.0.0
QT5=libQt5Core.so.5.12.8
SDL=libSDL-1.2.so.0.11.4
SQLite=libsqlite3.so.0.8.6

[Environment]
CLUTTER_IM_MODULE=ibus
COMPIZ_CONFIG_PROFILE=mate
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
DESKTOP_SESSION=mate
DISPLAY=:0
GB_GUI=gb.qt5
GDMSESSION=mate
GDM_LANG=de_DE
GIO_LAUNCHED_DESKTOP_FILE=<home>/Schreibtisch/gambas.desktop
GIO_LAUNCHED_DESKTOP_FILE_PID=20277
GPG_AGENT_INFO=/run/user/1000/gnupg/S.gpg-agent:0:1
GTK_IM_MODULE=ibus
GTK_MODULES=appmenu-gtk-module:gail:atk-bridge:canberra-gtk-module
GTK_OVERLAY_SCROLLING=0
HOME=<home>
INSIDE_CAJA_PYTHON=
LANG=de_DE.UTF-8
LANGUAGE=de_DE.UTF-8
LC_ALL=de_DE.UTF-8
LOGNAME=<user>
MATE_DESKTOP_SESSION_ID=this-is-deprecated
PATH=<home>/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
PWD=<home>
QT4_IM_MODULE=ibus
QT_ACCESSIBILITY=1
QT_AUTO_SCREEN_SCALE_FACTOR=0
QT_IM_MODULE=ibus
QT_LOGGING_RULES=*.debug=false
QT_QPA_PLATFORMTHEME=gtk2
QT_SCALE_FACTOR=1
SESSION_MANAGER=local/<hostname>:@/tmp/.ICE-unix/1668,unix/<hostname>:/tmp/.ICE-unix/1668
SHELL=/bin/bash
SHLVL=0
SSH_AGENT_PID=1863
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
TZ=:/etc/localtime
UBUNTU_MENUPROXY=1
USER=<user>
XAUTHORITY=<home>/.Xauthority
XDG_CONFIG_DIRS=/etc/xdg/xdg-mate:/etc/xdg
XDG_CURRENT_DESKTOP=MATE
XDG_DATA_DIRS=/usr/share/mate:/usr/share/mate:<home>/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share:/var/lib/snapd/desktop
XDG_GREETER_DATA_DIR=/var/lib/lightdm-data/<user>
XDG_RUNTIME_DIR=/run/user/1000
XDG_SEAT=seat0
XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0
XDG_SESSION_CLASS=user
XDG_SESSION_DESKTOP=mate
XDG_SESSION_ID=c2
XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session0
XDG_SESSION_TYPE=x11
XDG_VTNR=7
XMODIFIERS=@im=ibus
force_s3tc_enable=true