Make it compatible with Keepass 2.42 - address breaking changes

[alan-null]

Issue raised here: pfn#385

[alan-null]

Technically nothing has to be done because KeePass provided backward compatibility and it works fine now with 2.59.0

[Obsolete]
[XmlIgnore]
public bool ShowOnlyIfTrayed
{
    get
    {
        return ShowOnlyIfTrayedEx;
    }
    set
    {
    }
}

[DefaultValue(false)]
public bool ShowOnlyIfTrayedEx
{
    get
    {
        return m_bOnlyIfTrayedEx;
    }
    set
    {
        m_bOnlyIfTrayedEx = value;
    }
}

Affected code/feature removed here: 55bd524#diff-7bde3dde887d35feec66243874b3817cd7650974696116cdb728938545f494b4L743-L748

removed balloon tips <-- do not work on windows 8

Obsolete code will be removed.