[qtcontacts-sqlite] Properly emit changes to display label groups. Contributes to JB#45836

See merge request !31

Previously we emitted asynchronously before the transaction was
committed.  This commit ensures that we emit only if the transaction
is committed successfully by the writer thread, ensuring that there
is no race between readers attempting to access the updated
display label groups list, and the completion of the write.

Tests: don't depend on QtGui

See merge request !24

[qtcontacts-sqlite] Add `override` to virtual methods

See merge request !23

[contacts] Fix default sort order. Fixes JB#45731

See merge request !22

Configuration default should be First Name, not Last Name.

Tests: launch a temporary D-Bus session

See merge request !21

build: Fail build on undefined symbols

See merge request !20

Add .gitignore

See merge request !19

[qtcontacts-sqlite] Improve DLG plugin interface. Contributes to JB#44742

See merge request !17

[qtcontacts-sqlite] Allow empty sub-type for urls and anniversaries. Contributes to JB#44713

See merge request !18

Make it possible to specify a url/anniversary without a sub-type.

This commit improves the display label group plugin interface by
allowing plugins to report whether the specified locale is a
preferred locale for them, rather than merely valid, as some
plugins may work in multiple locales but should be preferentially
used (e.g. to determine the default display label groups) for
a subset of those locales.

For example, a pinyin grouping plugin might be valid in all locales
but preferred in locales which use Simplified Han writing script.

The database now populates the "default" supported display label
groups from the highest priority preferred plugin rather than
the highest priority valid plugin (falling back to highest priority
valid plugin if no preferred plugins exist for the current locale).

[qtcontacts-sqlite] Cleanups. Contributes to JB#38781

See merge request !16

Fix style, remove dead code etc.

And fix build in CI

Jb44707 core apps

See merge request !15

If some other process is holding open a database connection, the
database may not have been correctly upgraded to the current
schema version.

Previously, this could result in new processes assuming that
the schema was upgraded, and attempting to perform queries which
fail due to the fact that the real database schema might be
old.

This commit ensures that we detect this case, and print an appropriate
warning so that the user can take the appropriate action
(e.g. kill the offending process, or reboot the device).

[qtcontacts-sqlite] Automatically extend known display label groups at runtime. Contributes to JB#44742

[qtcontacts-sqlite] Allow , and . as DTMF pause. Contributes to: JB#44709

See merge request !14

[qtcontacts-sqlite] Don't link against QtGui unnecessarily. Contributes to JB#36025

See merge request mer-core/qtcontacts-sqlite!12

[qtcontacts-sqlite] Workaround issue with QWaitCondition. Contributes to MER#1853

See merge request !11