Added these new lean configs:

Key: com.openexchange.mail.flagging.mode
Description:
Specifies how color labels and special \Flagged system flag are connected (or not). Possible values:
-<code>colorOnly</code> Only color flags are available. The special \Flagged system flag is not touched.
-<code>flaggedOnly</code> Only special \Flagged system flag is used. Color labels are not published.
-<code>flaggedAndColor</code> Both - color flags and special \Flagged system flag - are available and set independently.
-<code>flaggedImplicit</code>Both - color flags and special \Flagged system flag - are available. A certain color label is linked with the \Flagged system flag. That is to add a color to colorless flagged mails and to add flagged to unflagged but colored mails.
Default: colorOnly
Version: 7.8.4
Reloadable: true
Configcascade_Aware: true
Related: com.openexchange.mail.flagging.color
File: mail.properties


Key: com.openexchange.mail.flagging.color
Description:
Specifies the color which should be added to colorless flagged mails in case the flagging mode is flaggedImplicit. Only values from 1 to 10 are allowed.
Default: 1
Version: 7.8.4
Reloadable: true
Configcascade_Aware: true
Related: com.openexchange.mail.flagging.mode
File: mail.properties