[ bugfix ]
* fix: dock active color not follow dde-control-center
* fix: tray overhanging text
* fix: tray always reset while dragging quickItem to tray
* fix: splash preview container
* fix: unmute when changed volume
* fix: expandwidget tray item can be selected
* fix: plugin back button not support hiDPI
* fix: bluetooth not refresh button
* fix: Icon of trashs is too large in small dock
* fix: radius for tray background
* fix: abnormal display of sound output device list
* fix: launcher shown in a wrong location while multi screens connected
* fix: multitasking unable to remove
* fix: unable call selected app preview window
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