ThemeFinder tuning

Add filter possibilities (full theme or object type) …
Add possibility to override the template

@gnerred with this configuration ```
        {
                ptype: "cgxp_themefinder",
                outputTarget: "addsitndatapanel.bbar",
                layerTreeId: "layertree",
                themes: THEMES,
                ignoreThemes: ['complet'],
                findTheme: false,
                findGroup: false,
                findFolder: false,
                outputConfig: {
                        layout: "fit",
                        style: "padding: 3px;"
                }
    },
``` does it do what you need ?