[EGD-4925] Change new filesystem handling implementation in module-gui. (#1193)

Due to vfs deprecation there is need to remove all vfs calls from code. This PR covers module gui. There are some modifications in other modules included which are necessary because of build system issues.

[EGD-4914] input and display languages connection to settings problem… (#1188)

* [EGD-4914] input and display languages connection to settings problem solved

[EGD-3995] setup sim window prepared basing on the old settings (#913)

[EGD-3995] updated to new settings
[EGD-3995] sim switch using CellularServiceApi

Merge branch 'master' into stable

[EGD-4522] USSD sesion handling (#1121)

Added USSD sesion handlig and small fixes on USSD.

Session handling was needed to show proper window on new incoming USSD code.

Co-authored-by: Kuba Kleczkowski <dd>

Merge branch 'master' into stable

[EGD-4516] sim api: change pin, set/reset sim lock pin, switch sim (#1110)

Added: sim api: change pin, set/reset sim lock pin, switch sim 

[EGD-4150] Change filename i18 to i18n (#1108)

Change filename of internationalization files from i18 to i18n.

I18n should stand for internationalization, not i18. That's why I changed in 'module-utils' name of the folder 'i18' and both .cpp and .hpp files to 'i18n'.

[EGD-3572] SettingsTable exchanged to settings::Settings (#968) (#1044)

[EGD-3572] Application has an instance of Settings - removed from derived apps
[EGD-3572] Application is the owner of Settings handling for its windows/widgets
[EGD-3572] Settings header moved to service-db public section

[EGD-4153] Use actions instead explicit applications switch. (#1032)

[EGD-4219] Convert service-evtmgr and service-lwip to library

[EGD-4215] Convert service-bluetooth to library

[EGD-4200] Message handling refactored. (#974)

[EGD-4151] Application manager actions introduced. (#905)

* [EGD-4151] Application manifest structure defined.
* [EGD-4156] Applications registry and basic action handler implemented.

EGD-4178 EINK inverted mode (#915)

* EGD-4178 Added simplistic eink invert mode option

[EGD-4011] added BT audio device with A2DP playback (#870)

Co-authored-by: SP2FET <bartosz.cichocki@mudita.com>

[EGD-3743] Removed old doxygen copyright statements from project.

[EGD-3743] Update copyrights in fies

[EGD-3773] added A2DP playback backend

EGD-4036 Application windows - added register mechanism

* Moved ApplicationLauncher to separate files - declutering
* WindowsStore renamed to WindowsFactory - Store needs to be splitted toavoid antipattern
* Options window build dynamically onBeforeShow
* Dialog windows dynamically built