qwt: more files from updating to qwt 6.1.1
qwt: delete unused file
pfd: Switching to QQuickWidget

Signed-off-by: James Cotton <peabody124@gmail.com>
welcome: Switching to QQuickWidget

Signed-off-by: James Cotton <peabody124@gmail.com>
Qt: update to 5.4
Merge pull request #1412 from peabody124/qt_5_4

Qt 5.4
Add HMC5983 I2C driver
Windows Packaging: include QtQuickWidgets

windeployqt doesn't include this automatically.
Merge pull request #1416 from peabody124/windows_packaging

Windows Packaging: include QtQuickWidgets
hmc5983 cleanup
Merge pull request #1414 from BrainFPV/hmc_5983

HMC5983 I2C driver
Merge remote-tracking branch 'upstream/next' into draco