Fix visibility access modifies for methods (see discussions in #370 and #387):
    * all virtual methods become public
    * direct methods become private (instead constructors and static methods for now)
    * such modifications perform by default and can be disabled by the option in preferences (`--respect-bytecode-access-modifiers` in jadx-cli)
    * if changed to method added comment (`Access modifiers changed, original: private`)

* feat: APK signature check v1/v2 using the apksig library from Google
* fix: proposed changes implemented

* fixed wait time for background jobs
* enable multi-threaded decompiling
* added preference for excluding certain packages from decompiling and indexing
* show message dialog in case classes are not indexed because of low memory
* added heap usage bar for visualizing Java memory usage

-Small typo corrected on a LOG.error String argument.

* add node

* add node

* add certificate panel

* add certifcate manager

* работа над проектом

* ресурсы

* включение возможности показа

* небольшие исправления

* start tests

* more tests

* signature test

* fingerprint test

* public key test

* удалено лишний код

* add scroll

add translation of Chinese

- don't use suffix tree in search
- decrease default working threads count (only 1 for background jobs)
- use string refs for store only one code string without duplicates
- use cache for creating UI nodes
- allow to disable autostart for background jobs (decompilation and index)