[EGD-5908] Fix bug in Logger + add log unit test

Because `vsnprintf` return value means:
"
The number of characters that would have been
written if n had been sufficiently large,
not counting the terminating null character.
If an encoding error occurs, a negative number is returned.
"

`Logger` crashed when log msg was longer than LOGGER_BUFFER_SIZE.
Checking `vsnprintf` return value solves this issue.

[EGD-5641] Fix cellular on linux

It fixes build for Linux with GSM enabled.

[EGD-6010] Fix addres in retry window

Address was lost while being forwarded to the retry window.

[EGD-5304] Add new way of system close

Unified method of closing
the system orchestrated by
system manager

[EGD-6002] Tweak stack size for service_lwip

Tweak stack size for service LWIP.

[EGD-6006] Stack optimization in the EventManager

Tweak stack usage in the EventManager service

[EGD-5925] Simulator heap use after shutdown defect

Fixed: destructor removed

[EGD-5974] Fix antenna stack size

Fixed stack size in service antenna and antenna test app.

[EGD-5911] Allow configuring worker stack size

Allow configuring stack size of a worker by a child class for a better
system heap utilization control.

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

[EGD-5724] Add pagination for Templates

Add pagination for Templates
Fix bug in change message template response

[EGD-5916] Removed duplicated connect in ServiceCellular.cpp

Removed duplicated connect in ServiceCellular.cpp causing
service init errors.

[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-6000] Fix stack usage for service time

Currently service time waste a lot of stack. This
patch reduce stack usage of the service time stack

[EGD-5931] Create Quotes db schema

Create Quotes db schema

[EGD-5999] Fix stack size for calculator

Set stack size to 2,5kB for calculator app

[EGD-5986] Fix re-enabling BT scan

Due to incorrect stopping the BT scan, re-enabling it caused
failure to HCI state machine, which was indirect cause of failing
connections. Now it works

[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

[EGD-5984] Add BT implementation of added GUI actions

Implemented BT-side actions for GUI usage, e.g. connection status

[EGD-5758] Restore auto locking timer in ApplicationManager

Restore auto-locking functionality

[EGD-6008] Change filesystem in RAEDME.md

Changed to the new 'littlefs' filesystem.