Plasma

• redesign some network icons #47
• fix shadow on Notes & Clock widgets
• new style slider #48
• add Action Overlays buttons

Kvantum

• new style slider #48
• added style for ToolbarLineEdit
• added style for ToolbarComboBox

Wallpaper

• new wallpaper by @varlesh (good for night)

Look & Feel

• update preview

Yakuake

• Add shadows on title