This field is used by the generic project manager which passes the
".config" file in it. The advantage is that both the SnapshotUpdater and
the clang code model do not need to do anything smart, but can pass it
directly to the preprocessor.

Task-number: QTCREATORBUG-11390
Change-Id: I44fc7b20afd28fb59608412f2cce86af6f7e7d6b
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Change-Id: Ib5423fdd064e4546f848c0b640b0ed0514c26d3a
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

So we can ignore possibly problematic toolchain-defines, while can still
unconditionally apply project-defines.

Change-Id: I7cb96f35a963d080011fe888ef71bfc098dd33ef
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

- fix memory leak in find-usages
- do not retain snapshot in search history
- when an editor is invisible for more than 2 minutes, release the
  backing snapshot

Retaining snapshots will retain their documents, and if done for too
long, the memory consumption might grow. This is especially the case
when switching to a different kit (Qt version): in that case, the new
versions of headers will be indexed, while the old ones stay around.

Task-number: QTCREATORBUG-5583
Task-number: QTCREATORBUG-7645
Task-number: QTCREATORBUG-9842

Change-Id: I045eda1565e0a3fa702baeffaab9c12662f90289
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Task-number: QTCREATORBUG-10280

Change-Id: Ibc6ffeedb97a31a35a2d1f00625506f844692e16
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

... when invoked on a macro that is defined inside that dialog.

Change-Id: I419c6675d70cfb8dd174f6a33f502b4c584baa3a
Reviewed-by: David Schulz <david.schulz@digia.com>

Task-number: QTCREATORBUG-10282

Change-Id: Ia58359f774c72260956caecd5f63d44b612d1451
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>

Change-Id: Ic3578bd98c2f1aefcaef61f5b993dc9a67ca5a77
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

The UI side will come in another commit.

Change-Id: I1038a438587fe4cef70408f7f627d08837fc192d
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

Task-number: QTCREATORBUG-476

Change-Id: I82ed92acdcda551d2c6a9ca221832ac20117a08f
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

If two files from different (sub-)projects include the same header file,
and the defined macros differ for both files, the header file will be
parsed with only the appropriate macros for the including file.

Task-number: QTCREATORBUG-9802
Task-number: QTCREATORBUG-1249

Change-Id: I560490afa287b3bb1e863bce1bb4f57af36ad56e
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>