The Parentheses, TextBlockUserData and TextEditDocumentLayout classes
and their member function implementations were spread around the
BaseTextEditor class. Moving them to their own file to make the code a
bit better organized.

Reviewed-by: mae

Reviewed-by: Thorbjørn Lindeijer
Task-number: QTCREATORBUG-1261

The TextEditorSettings class already provides the appropriate signal.

It's annoying and not very useful if they get grabbed and handled by the
completion list. This happened as a side effect of
fc1780f1.

Remove all hacks/conventions of considering the last generated
file as project file, etc. and instead add attributes flags to
Core::GeneratedFile, giving fine-grained control of what to do
with the file. Implement static utility functions in wizards
that handle it. Add boolean XML-attributes "openeditor"/"openproject"
to the file elements used by the CustomWizard XML-specification.
Manually set the attributes in all wizards.

Task-number: QTCREATORBUG-1166

Done with mae.

It now behaves less logical but closer to what vim does. Since
this is the main target group, the change is probably right.
In detail: Overwrite cursor no longer shows *what* will get overwritten,
but instead it simply indicates *that* the editor is in overwrite mode,
with a more or less fixed size (fixed when the font is truly monospace).

The added logic is that if the font has more than one style, to ask for the point-sizes
of the first style. If that's also empty, return the list of standard point-sizes.

Task-number: QTCREATORBUG-1153

Done with mae and Jens Bache-Wiig.

Reviewed-by: mae

Especially in combination with block highlighting.

Task-number: QTCREATORBUG-365
Reviewed-by: dt

When drawing the background for an ifdefed-out block, expand
to the end of the visible viewport, even when scrolled
horizontally to the right.

We now use two cursors, with the first one being positioned at the
character before the find scope starts. This makes it possible
to extend the scope when typing at the beginning or the end of
it. This is more what the user expects. The effect is noticable
with find&replace of words at the beginning or end of the scope.

Trying to clean up a little.

Might have been the cause of endless creations of "customized" color
schemes as seen by Roberto.

Task-number: QTCREATORBUG-1065
Reviewed-by: mae

Reviewed-by: thorbjorn

The fake tooltip duplication is not nice.

Replaced the two checkboxes with a combo box for block
indentation: Exclude Braces, Include Braces, GNU Style

Reviewed-by: mae
Merge-request: 133

Signal is called contentsChangedBecauseOfUndo

Task-number: QTCREATORBUG-1077

Previously, it could contain multiple directory separators, . or ..

This makes using the filename safe for hashes like the ones used in the
C++ and Qml code models.

Reviewed-by: Roberto Raggi
Reviewed-by: mae

Fixed colors to use the same as refactoring rename, and a few
fixes for undo and document changes outside the tab areas.

Reviewed-by: Roberto Raggi

Some categories do not have icons yet, unfortunately.

Instead of using a tree based options hierarchy.

Task-number: QTCREATORBUG-954
Reviewed-by: Friedemann Kleint

If the disabled code format in creator does not have a background
defined, we now use the page's default background.