any way to force SVG icons instead of fonts?
### reason
if browsers disabling/not supporting custom fonts, it will look like this:

![Screenshot_2020-10-17 Framework7 - Full Featured Framework For Building iOS, Android Desktop Apps_20201017112644](https://user-images.githubusercontent.com/59403389/96335948-6d429000-107c-11eb-92e5-a39ffbe0f7c6.png)
![Screenshot_2020-10-17 Framework7 Icons_20201017112644](https://user-images.githubusercontent.com/59403389/96335952-703d8080-107c-11eb-96c5-58eab32a9484.png)


it doesnt even hide overflow text