Allow user to change font size to better fit there preference

[Bits-Bytes-354]

Is your feature request related to a problem? Please describe.

Font size is very small and i am not able to change it, it very difficult to read and use the software with such small font.

Describe the solution you'd like

Allow the user to change font size on their, so they can change the font size as per their preference. It would be better is there we can control is more granularly then having only 3 presets of 'small' 'medium' and 'large' or something like such.

Describe alternatives you've considered

Can't think of any alternative solution.

Additional context

N/A

[onesounds]

It will be added along with the improvement of the theme function.