Theme creator button colors are swaped

[alseether]

On CreateThemeContent.js, the text and background colors are swaped.

const getThemeObj = () => {
        const themeObj = {};
        themeObj[_.camelCase(state.themeName)] = {
            "id": generate(),
            "name": state.themeName,
            "colors": {
                "body": state.bgColor,
                "text": state.txtColor,
                "button": {
                    "text": state.btnBgColor,           // <= This two lines are swapped
                    "background": state.btnTxtColor     // 
                },
                "link": {
                    "text": state.linkColor,
                    "opacity": 1
                }
            },
            "font": state.font
        };
        return themeObj;
    }