[EGD-6534] TextFixedSize crash on char removal fix

Fixed TextFixedSize character removal crash on single line
space case. Added UT to cover it and other missing TextFixed
sized drawLines cases.

[EGD-6515] Answer/reject calls using headset

Clean up propagation of headset keys events
Clean up volume control with headset keys
Update key mappings for simulator
Use headset OK key to answer/reject calls

[EGD-6507] Enable per-module testing

Add per-module:
 - test build
 - test execution
 - coverage reporting (xml/html).

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>

[EGD-5567] Add code coverage reporting

Add HTML and XML code coverage report generation with gcovr.

Cleanup unittests list - add missing googletest-gui to the unittests
list; remove dead functional tests.

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>

[EGD-6388] Fix TextLine addition and deletion with scroll test

Fixed missing line start condition memorizing on empty blocks
removal.

[EGD-6415] Do not silently crash on empty image name

Image should not silently crash with empty or incorrect image name.

[EGD-5792] Fix small typos in header comments

Changing some spellings in comments. Item, parent, axis, and position.

[EGD-6262] Refactor Quotes

- Connect QuotesMainWindow to work with agent,
- Use DatabaseModel in Quotes and Categories models,
- Connect add/edit/remove quotes with agent

[EGD-6314] Phone mode widget visibility

Phone mode widget will be visible only on main screen, while entering
numbers or in emergency call mode. Also it will be disabled whenever NAT
widget is enabled.

[EGD-5744] Phone mode status bar widget

Added phone mode widget to top bar. The widget is mutually exclusive
with NAT widget. Phone mode is determined using phone mode observer.

[EGD-6111] Timers refactored

Deep refactor of system timers.

[EGD-6009] Test and repair Update process

Fixes to improve Update process.

[EGD-5449] Add final prompts windows

Added Dialog windows for "configuration successful"
"no configuration" and "update OS" for Onboarding.
Refactor Dialog window implementation and usage of
DialogMetadata in other applications.

[EGD-5624] Added window update

This PR introduces mechanism for passing
data to the currently displayed window by
switch data.

[EGD-5902] Phone Modes Windows

Windows for phone modes created.
Offline:FightMode/messages only ServiceCellularApi created.
ConnectionFrequency and DND options settings throught AppSettings.

[EGD-5969] Add battery charging UI

Battery charging UI modified
according to design

[EGD-6043] Change status bar layout

Status bar is rewritten to use box layout

[EGD-6014] Fix top bar includes

This is only clean up of includes, no functional changes

[EGD-5883] Added generic button popups attach to applications

Created structure and implementation for popup windows
attachments on button actions into applications. Moved Volume
window to fit into solution. BarGraph refactored.

[EGD-5832] Status bar widgets refactor

Status bar SIM widget refactor
Status bar time widget recfactor
Status bar lock widget refactor
Separation of status bar time widget and desktop main window time widget
Fixed issue with wrong calculation of timezone based time