* Handle environment variables in workdir, executable name as
   well as arguments when starting an application
 * Cover both debugger and normal application starts

Reviewed-by: dt

Expand environment variables in working directory, executable name
as well as arguments of the CustonExecutableRunConfiguration.

Reviewed-by: dt

 * Expand environment arguments
 * Introduce new kind: ExistingCommand
 * Use PATH to look up ExistingCommand

Reviewed-by: dt

Add a method to find an executable:
 * Expand environment variables
 * If relative: Check provided directories
 * If still not found: Check the path

Reviewed-by: dt

Task-number: QTCREATORBUG-1517

It's meant to be.

Reviewed-by: Daniel Molkentin

Reviewed-by: Alessandro Portale

in case Designer shows messages about missing resources or such.

Task-number: QTCREATORBUG-2427

Explicitly delete the root project item when closing a QmlProject.

When adding a multiselection of images outside the qrc-path,
the file dialog is created every time, causing great
delays due to DBUS problems. Create a context struct
keeping the dialogs around.

When multiple threads share the Bind instance in a Document and do
lookup on the objects contained inside, that may trigger a new object
creation in some situations - which needs to be synchronized.

This avoids asserts and catches exceptions

Original code by dcarr.

Fix Basefilewizard to use ModeSwitch flag.

Enable QuickDesigner by default in master

See: QTCREATORBUG-2365

See: QTCREATORBUG-1466

Fix capitalisation. Make tooltips more informative.

Reviewed-by: thartman

As it causes problems on standard-Linux installations.
See also QTCREATORBUG-2238.

This reverts commit 0e318bfc.

Implement WatchModel::data() to return the right values
for Qt::EditRole, obsoleting the role matching in the delegate.
Similarly, handle Qt::EditRole in setData(), leaving only
'Change watch expression' in the delegate, which removes
and recreates a row, causing crashes when done in setData().

Tooltips can still be improved.

Reviewed-by: Leandro Melo