Fix loading animation example css on GTK/QT
Fix loading animation example css on GTK/QT

shivaprsdv/pywebview,shivaprsdv/pywebview,shivaprsdv/pywebview,r0x0r/pywebview,r0x0r/pywebview,r0x0r/pywebview,shivaprsdv/pywebview,r0x0r/pywebview,r0x0r/pywebview