Makes QTCREATORBUG-2243 easier to do.

 * Fix all warnings about non-explicit constructors except for those
   in 3rdparty code.

Block selection was "broken" when using tabs, or rather
incomplete: It treated tabs as normal characters, which
has shown to be unexpected by people using tabs in code.

The new implementation has a vastly improved find scope
as well. In addition, creating a blog selection with
mouse or keyboard feels a lot more solid now, as the
actual selection is detached from possible valid cursor
positions.

Task-number: QTCREATORBUG-1541

Using more *::Constants::ICON_* where it makes sense and
wrapping the file names into QLatin1String where they were
missing.

The increased usage of the ICON constants needed a few more
cross plugin includes of *constants.h, here and there.
I think that it is OK, since the dependencies were alredy there
icon resource wise.

Use the right painting methods to make it look good, and also make
(de-)selecting all subitems of a node possible.

For some items with Symbols Search this will now both expand and jump to the
result.

Reviewed-by: con

Required refactoring of the search result window to show real trees of
search results.

The backend is the backend from the Locator filter, which is a bit
outdated now.

This was the main goal of the new generalized Find::FindFlags

For later use in IFindFilter.

We had multiple cases where people were assuming that you can't do
project wide search/replace, because they tried Ctrl+f and that is only
single file.

Reviewed-by: Thorbjørn Lindeijer

Also show "Replace", "Replace & Find" and "Replace All" in the tool bar,
i.e. don't show the "Replace & Find Previous" in the tool bar to avoid
it getting crowded.

Reviewed-by: Thorbjørn Lindeijer

If a plugin requests asyncronous shutdown, the shutdown sequence does
not continue to deleting the plugins before it has sent a
asynchronousShutdownFinished signal. During that time an event loop
is running.

Similar to what we do in the find tool bar.

Task-number: QTCREATORBUG-1543

Also unify some method naming.
Use the new feature to add clear buttons to the Locator,
and the find tool bar.

Task-number: QTCREATORBUG-705

Task-number: QTCREATORBUG-1438

Task-number: QTCREATORBUG-1438

So that QT_USE_FAST_OPERATOR_PLUS QT_USE_FAST_CONCATENATION
may have an effect.

A mostly mechanical change.

Reviewed-By: con

Task-number: QTCREATORBUG-1690

Reviewed-by: dt

Due to different text positioning logic between the QItemDelegate and
the way SearchResultTreeItemDelegate drew the line numbers, the line
numbers did not align properly to the line of text next to it.

This was fixed by relying on QItemDelegate::drawDisplay for drawing the
line numbers, so that the same positioning logic is used.

This exposed a small right-alignment bug in QTextLayout, for which a fix
is coming to Qt.

Done-with: Erik Verbruggen

The change makes the "replace with" line edit for symbol
renaming wide enough.

The default QLineEdit has space for ca. 17 characters, we now
expand to the maximum of 25 and the space needed for the replacement
text.

Vertical block selections could be painted where there was no
selection, or they could jump randomly to columns futher right.

Reviewed-by: dt

Use it to change the find and candidate find object in CurrentDocumentFind:
this will allow to replace the IFindSupport object used.

Merge-request: 115
Reviewed-by: con <qtc-committer@nokia.com>
(cherry picked from commit d3b58c2d)

Use it to change the find and candidate find object in CurrentDocumentFind:
this will allow to replace the IFindSupport object used.

Merge-request: 115
Reviewed-by: con <qtc-committer@nokia.com>