[EGD-4822] Add color test window to settings app

Add new window to allow convenient display and globally
change used color intensities  for design and testing purposes.
Changes were introduced to Renderer as well as GUI service
to allow global change of used color scheme.
When using list, screen is deep refreshed each
time the color is changed.
Known issues:
Item focus borders (top,bottom) with changed black intensity
may not render properly, however it doesn't obscure the
target functionality.

[EGD-5472] Bluetooth worker state machine

State machine POC implemented using SML library.

Merge branch 'master' into stable

[EGD-5325] Remove using namespace directives from headers

"Using namespace" directive should not be added in headers
because this practice pollutes source files.

[EGD-4801] Add application-wide top bar manager

Applications configure the top bar once for all their windows.
Sometimes, windows need to configure top bars with its configuration.

[EDG-4717] Add screen for brightness control

Window for manual and automatic screen brightness control.

Merge branch 'master' into stable

[EGD-5087] Update Options and replace PageLayout with ListView

PageLayout removed and replaced with ListView.
Options structure and namespace cleanup.
Added ListView ScrollBar type and disable on
construction.

Merge branch 'master' into stable

[EGD-5150] Fix Crash on enter Settings Information

Loading bootCfg casues stack overflow in Settings module
and crash of application.

[EGD-4502] Fix and remove old vfs boot

Remove old vfs bootconfig from the vfs which
will be removed in the later commit

[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

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>

[EGD-4687] Text enum names cleanup. (#1142)

Change enum names to CamelCase.

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