Weboob scripts improvements

The sorting of the existing banks.json has been done with the following script:

let fs = require('fs');
let json = JSON.parse(fs.readFileSync('./banks.json'));

let newJson = [];
for (let entry of json) {
    if (entry.customFields) {
        for (let cf of entry.customFields) {
            if (cf.type === 'select') {
                cf.values.sort((a, b) => {
                    if (a.value < b.value) {
                        return -1
                    }
                    if (a.value === b.value) return 0;
                    return 1
                })
            }
        }

        entry.customFields.sort((a, b) => {
            if (a.name < b.name) {
                return -1;
            }
            if (a.name === b.name) return 0
            return 1
        });
    }

    newJson.push(entry);
}

fs.writeFileSync('./banks.json', JSON.stringify(newJson, null, 4))