[EGD-4708] Add backend of multiday events handling

-sql req for multiday events handling
-Add UT
-Add markEventsInDays method
-Add new query for day filter

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-5133] Fix settings bus add duplications

Changed Bus Channels vector to set to prevent
duplicates and cleaned logging.

[EGD-4921] Add next harness test cases

Test harness extended with additional tests:
- Making a call to a specific phone number.
- Calling back to the last number from the call log.
- Searching for SMSes with a phone number filter.

[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-4696] Several stabilization patches. (#1192)

Merge branch 'master' into stable

[EGD-3842] Modify events records tests and add providers fields to DB (#1138)

[EGD-4009] alarm clock: add main window (#1100)

Create alarm clock application and add main window.

[EDG-4494] Exclude contacts from temporary group (#1109)

* [EDG-4494] Exclude contacts from temporary group

[EGD-4446] Change: new filesystem handling implementation in module db. (#1052)

Due to vfs deprecation there is need to remove all vfs calls from code. This PR covers module database. It also contains minor fixes in module-db.

[EGD-4343] use new settings in ServiceAudio (#997)

* [EGD-4343] ServiceAudio moved to new settings

Merge branch 'master' into stable

[EGD-4553] Notes search engine implemented. (#1112)

[EGD-4487] Application notes implemented. (#1094)

* [EGD-4487] Implementation of notes application.

[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-4354] settings starting script moved to two separated scripts (#1067)

[EGD-4167] Add n display languages loaded from files (#1047)