E.g. in split editors with small main window. We now have line edits
with a minimum size and use a flow layout for the replace buttons (which
will reduce width when necessary by laying out vertically).

Flow layout is taken from the Qt examples.

Task-number: QTCREATORBUG-3279
Change-Id: Ic07d4d3e75e3d928d6b53534adb42481ce26256b
Reviewed-on: http://codereview.qt.nokia.com/666


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Leandro T. C. Melo <leandro.melo@nokia.com>

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

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

Also move Designer::Internal::FormWindowEditor ->
Designer::FormWindowEditor.

For this we needed to get rid of using QToolBar.

Let Qt figure out the correct monimum size. That fixes a rather strange
resizing behaviour.

Task-Nr: 257144

Details:
This ensures that the Find label text is aligned with the
Application output.