[MOS-530] Various calculator app fixes

* Fixed issue with subtract operation triggering unusal behavior.
* Unified handling of the add,sub,mul,div operations.
* Updated and verified existing unit tests and added new ones covering
unhandled cases.
* Added basic requirements/readme.

[CP-1624] Adding numberID as a field to contact and message response

Changing the way Center is recognizing the threads in the message
window by introducing the numberID

[MOS-29] Fix invalid screen after missed call

Fix of the issue that missed call triggered
view that shown 'call ended' text.

[BH-1609] Fix resizing of format in TimeSetFmtSpinner

Change the resizing logic of the children of TimeSetFmtSpinner.
Remove arguments of TimeSetFmtSpinner and BellStatusClock ctors.

[MOS-893] Fix invalid time description in the SMS thread

The sending/receiving time information will be displayed as follows:
- Only an hour –> for today
- Yesterday and hour –> for messages received/sent yesterday
- Day of the week and hour –> for messages received/sent within
last 7 days
- Date (day+month) and hour –> for messages older than week,
but still from the same year
- Date (day+month+year) and hour –> for messages
rom previous years

[MOS-871] Loudspeaker icon not updated when audio routing has changed

Fix for the loudspeaker icon has not changed while calling with
loudspeaker on and connecting headset to the phone.

[MOS-196] Add days of the week to the list of SMS, calls and notes

If an event (e.g. receiving a call or SMS) happened
in the current week, we display the days of the week
instead of the date on the list.

[MOS-204] Fix screen ghosting after emoji selection

Fix of the issue of screen ghosting after
emoji selection, visible particularly well
in messages app - changed fast refresh
to deep one on returning from emoji selection
screen to the previous application.

Additionally minor code cleanup.

[MOS-578] Fix incorrect logic with SMS notifications

Fixed case, when there's only one thread unread and
there's no info about the thread, only a generic message

Tests are deleted because the fix would require rewritting ALL
of those tests - those will be written with new implementation
of notification table

[MOS-35] Add more input modes for USSD reply

Previously only the mode restricted to digits was available.

[MOS-192] Time should not include 0 at the beginning

Fix for displaying an additional 0 at the begging of the clock.
It affects the clock in the status bar and messages and calls time.

[MOS-884] Importing contacts from SIM card more than once

Fix for importing and removing contacts from SIM card causes issue that
imported contacts didn't have a name and could by multiplied.

[MOS-172] Fix asterisk button behavior in contacts

Fix of the improper asterisk button behavior
in new contact window - pressing the button
to change an input mode resulted in
'OPTIONS' label being displayed for the
left function button in navbar when the
asterisk button was held.

[MOS-483] Import SIM card contacts properly

According to information elaborated by Quectel, the contacts don't have
to be saved on a SIM card contiguously and the only way to make sure all
of them are imported is to request for the range [1, 250] (first to
biggest allowed index).

[MOS-279] Add templates list looping

Fix of the issue that templates list was
not looped.

[MOS-60] Fix displaying an incorrect window after ending a call

After quick dobule "END CALL" selection, the window
for adding a contact is displayed for a while.

[MOS-52] Fix the data displayed on snoozed alarms screen

When we were currently in the snoozed alarms screen and a new alarm
rang, the data was displayed incorrectly.

[MOS-864] Fix for country code in new contact based on deleted one

Fix for scenario when contact with some number with/without country code
was deleted, and new contact with same number but without/with country
code is added and then new contact have same prefix as deleted one.
Now new contact will have number exacly like provided.

[MOS-361] Fix improper fonts in navbar

Fix of the issue that navbar fonts for the
left and right function buttons were bold,
what was inconsistent with the design.

[MOS-68] Deleting a contact flow finishes with a wrong screen

Fix for displaying wrong screen after contact removal