Skip section headers when initializing settings object to prevent TypeError

[janAkali]

Uncaught TypeError: can't access property 0, choice is undefined
    getOrCreateSettingsObj Polyglot for Codewars.user.js:18217
    getOrCreateSettingsObj Polyglot for Codewars.user.js:18217
    glotGetOption Polyglot for Codewars.user.js:18224
    attachBoxListeners Polyglot for Codewars.user.js:18270
    attachBoxListeners Polyglot for Codewars.user.js:18265
    buildConfigDialog Polyglot for Codewars.user.js:18292
    buildPolyglotConfigMenu Polyglot for Codewars.user.js:18316
    dispatch Polyglot for Codewars.user.js:3
    handle Polyglot for Codewars.user.js:3
    n helpers.js:73
nim:18217:76

Section Items don't have a name field:

polyglot/polyglot.js

Line 913 in 44ec27b

{type: 'section', label: 'General Settings'},