[TOOL IMPROVEMENT] Base64 image viewer

[agc93]

trafficstars

Describe the solution you'd like The existing Base64 file converter is useful for converting images stored in base64/Data URI format to a real image, but it would be even better if images could be viewed inline without having to download and open.

Additional context An example of this functionality is this tool (source here)

[sharevb]

Hi @vlasovt, @xiaohongred, implemented in #905, thanks to @SAF2k for preview image part