[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

[EGD-5325] Remove using namespace directives from headers

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

[EGD-5175] Fix grid layout navigation

Fix grid layout navigation in order to recognize
"not active" items

[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.

Merge branch 'master' into stable

[EGD-5166] Add query-callback synchronization mechanism

Receiver object cancels the callbacks at the end of its lifecycle.

Merge branch 'master' into stable

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

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

Change enum names to CamelCase.

Merge branch 'master' into stable

[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-3698] Add UT for TimeRangeParser. (#750)

Move TimeRangeParser to module-utils.

[EGD-3512] Create ICS Parser (#892)

-Create application desktop endpoints for calendar events
-Modify Calendar Database Interface
-Create ParserICS lib
-Create calendar events endpoints test
-Create UT for ParserICS

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

Revert "[EGD-3572] SettingsTable exchanged to Settings::Settings (#968)" (#1035)

This reverts commit f11bc1f0d0120c04ee6f826f75c9e8a9f5894602.

Co-authored-by: Hubert Chrzaniuk <hubert.chrzaniuk@mudita.com>

[EGD-3823] Create Popup windows (#946)

-Create bargraph widget
-Create Home modes window
-Create Volume window
-Create Brightness window
-PR changes

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

[EGD-3572] Application has an instance of Settings - removed from derived apps
[EGD-3572] review issues resolved
[EGD-3572] shared_ptr -> unique_ptr
[EGD-3572] Primary Key for settings_tab:path
[EGD-3572] empty values handling

[EGD-4217] Convert service-db to library

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

[EGD-3809] Calendar changes after UX redesign (#745)

Add an additional field for date of the event.
Set 'all day' event as a default option when you add a new event.
Change in the design of AllEventsWindow and EventDetailWindow according to UX redesign.