Unified the way the property value and the vault object are passed to controls.
Unified and improved the general look & feel of the current metadata card implementation.
 - Using BackgroundItem control instead of Button for different controls.
 - Uniform padding for the labels of different control types.
 - Fixed the text color of Integer and Real controls.
 - Aligned labels of selections lists to the center of the items.
Mostly fixed the Time control.
 - Follows locale, including 12-hour clock. (Though : is always used as a separator instead of .)
 - AccurateTimePicker displays the previous value when opened.
Formatted the QML controls with the Qt Creator's Reformat File command.
 - Replaced spaces with tabs
 - Applied more consistent indention for braces.
Date control now correctly selects the previous date. Also changed the formatting of the Date control to "short".
Improved multi-line text control.
 - The size of the text are is now limited -> text won't overlap with other property values.
 - Hide the default Silica TextArea separator as it overlapped with the written text when there was lots of it.
 - More/Less button for toggling the size of the text editor.
 - Added additional UI element to better communicate the size of the multi-line text control.