Add an option to use native editor control instead of wxSTC / Scientilla

[wangqr]

This will be a workaround for #51, #80, Aegisub#190, Aegisub#197, etc.

Syntax highlighting vs usablity

[samidadi]

Thanks for the reply! I honestly didn't understand what to do. I'm not even a beginner. ^^

[samidadi]

I'm using Aegisub for Windows by the way.

[wangqr]

For those who are willing to try this out, I've added a option to disable the wxSTC editor and use native wxTextCtrl instead. This should solve most IME related bugs at the cost of syntax highlighting.
增加了一个开关用于控制字幕编辑框使用wxSTC还是系统原生控件，后者对输入法等的兼容性应该更好，但不支持语法高亮等高级功能。欢迎试用及反馈问题。

The new r9178 builds for both Windows and macOS are available at https://ftp.wangqr.tk/aegisub/
r9178的Windows和macOS编译结果可在此下载 https://ftp.wangqr.tk/aegisub/

[samidadi]

Thank you SO SO SO much!!!
It worked! Finally and after years and years, now we can use Aegisub easily!
Thanks again!

[MadokaAyukawa]

The font is really small for me. And the options don't seem to change it, unless I'm missing something.

[wangqr]

The font is really small for me.

Font size currently doesn't work with native text ctrl. Reported in #93

[Summer-Arrival]

有了这个功能后Mac上aegisub输入框错位的问题已经解决，而且也没有楼上字体过小的bug，非常感谢！

[animefn]

@wangqr

The new r9178 builds
I tried this version. The selection/hover acts fine finally. But it breaks again with more recent builds like the r9212.

Also, While the selection works much better for rtl languages, it will still be great if the editor behaves properly and the text gets aligned on the right with text-direction set to RTL (putting the text on the right side is just not enough as it does not fix numbers and punctuations, there is a difference between alignment and direction)

Thanks