[AVLE] Changing Body Font Size

In mobile devices, it might not be convenient unless the font size is flexible.
In addition, the proper font size of a post varies from person to person.

So I have implemented to interface to change the body font size. The following is the xlarge size. The larger the font, the wider the line spacing.

There are four options for the body font size.

When the small size is chosen, then the post screen looks like this:

Another good thing is that your selection will be stored in the DB. So you will experience the same font size with different devices and browsers.

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