[EGD-5158] Change access to the bus methods

The bus is now accessible only via Service object.

[EGD-3434] ListView Scroll bar refactor

Added two new scroll bar types. Fixed for ListView
with equal height elements and PreRendered which
require whole list render - not recommended for big
lists but works with not equal heights elements.
Applied new types to all lists in Pure. Various
cleanups and refactors inside models and listView.

Merge branch 'master' into stable

[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-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-5166] Add query-callback synchronization mechanism

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

[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-3442] Fix list empty window unhandled behaviours, in place rebuild handling, notes rebuild on note deletion and changed call Icon name to stateIcon. (#1160)

Merge branch 'master' into stable

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

Change enum names to CamelCase.

Merge branch 'master' into stable

[EGD-3499] Text scrolling added and its usage updated in widgets. (#1079)

Add Text scrolling, Add text starting position,

Added text scrolling, updated TextLine line endings, TextBlocks newline handling, updated SMS Bubble and Notes text items. Added tests for scrolling.

[EGD-4554] Set the limit of a note text to 4'000 characters. (#1123)

* [EGD-4554] Notes file cleanup; They're not used anymore.
* [EGD-4554] Set the limit of a note text to 4'000 characters.

[EGD-4561] Fixed displaying the special characters in a note title. (#1124)

[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