* Fix garbled text when display scalling > 300%
On Windows, if your display scaling is greater than 300%,
the text rendered by imgui will be garbled. Allowing imgui
to do the scaling instead of making the font to large
corrects the issue.
* Only use modified scaling on Windows
And only if the system's scaling factor is greater than 300%.
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Co-authored-by: SoftFever <softfeverever@gmail.com>
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