Resolve "Restore custom font"

Closes #91

See merge request !88

Resolve "Normalize Activity application architecture"

Closes #89

See merge request !87

Resolve "Use ApplicationSettings widgets from flutter_custom_toolbox"

Closes #88

See merge request !86

Resolve "Use flutter_custom_toolbox for common features"

Closes #87

See merge request !85

Resolve "Use flutter_toolbox lib"

Closes #74

See merge request !84

Resolve "Restrict ABI builds to armeabi-v7a and arm64-v8a"

Closes #85

See merge request !82

Resolve "Restore internet permission"

Closes #86

See merge request !83

Resolve "Improve build process"

Closes #82

See merge request !79

Resolve "Bump version"

Closes #84

See merge request !81

Resolve "Fix build process"

Closes #83

See merge request !80

Resolve "Fix build process"

Closes #81

See merge request !78

Resolve "Release new version"

Closes #79

See merge request !77

Resolve "Fix build process"

Closes #80

See merge request !76

Resolve "Fix build process"

Closes #78

See merge request !75

Resolve "Fix package name"

Closes #77

See merge request !74

Resolve "Fix "android:build-release" CI step"

Closes #76

See merge request !73

Resolve "Fix "application:release" CI step"

Closes #75

See merge request !72

Resolve "Improve build process"

Closes #72

See merge request !71

Improve build process, according to "Build multiple APKs" https://developer.android.com/build/configure-apk-splits

Resolve "Clean / improve / update code"

Closes #66

See merge request !64

Resolve "Improve StyledButton widget"

Closes #73

See merge request !70