Panel height handling
Make it work for vertical panels too
Update quicklaunchaction.cpp

Fix default application icon not displaying when executables are added to quicklaunch problem.  Addresses #39.
emit realigned () is now called always AFTER LxQtPanel::realign()
Merge branch 'panel-height' of https://github.com/paulolieuthier/lxqt-panel into paulolieuthier-panel-height

Conflicts:
	panel/lxqtpanel.cpp
Merge branch 'paulolieuthier-panel-height'
Make the "Mixer" link in volume plugin be themeable
Prepare the CMakeLists.txt files for building with Qt5.
Prepare for Qt5

* Use portable header names & disable QT_EXPORT_PLUGIN2() when needed.
* Use xcb_generic_event_t instead of XEvent for x11EventFilter() in Qt5.
Qt5 fixes

* Fix broken API compatibility for Qt5.
* Disable plugins that do not work with Qt5.
* Use fixx11h.h hack from KDE to workaround name clashes between Xlib and Qt.
* Fix showdesktop and desktopswitch plugins by enabling xcb event filter.
Add missing plugin metadata to make them loadable in Qt5.
Fix taskbar plugin for Qt5.
Try to fix tray plugin.
Fix building kbindicator plugin with Qt5 and XCB (not fully working).
Fix incorrect handling of xcb event, fixing tray plugin.
Set _NET_WM_WINDOW_TYPE_DOCK to the panel to workaround a bug in Qt5.
Look for the Qt5 version of SysStat when appropriate
Use portable LXQt header in .ui files too
Use portable SysStat headers
Properly include sysstat directories