Add: Select comma or dot for file name

[ghost]

Description

Currently, when exporting an APK file, this file name is displayed in the File Manager app (with commas).

NewPipe_0,18,5_(850)_org,shabi,newpipe_1583414036.apk

In the "Settings" there should also be the possibility to select the dot for the file name. This is how it would look like.

NewPipe_0.18.5_(850)_org.shabi.newpipe_1583414036.apk

App info

• SAI 3.7
  https://github.com/Aefyr/SAI/releases/tag/3.7

[Aefyr]

That is possible in debug settings (3+ taps and then a long tap on SAI logo on about screen). But I won't add that to main settings since commas are used for compatibility with "open with" feature - 5 or more dots in path to an .apks file break it.