create_cmake: Fix mingw plugin path

MinGW static libs use libfoo.a format, and not foo.lib.

Change-Id: I899adca8ec0b1c8430f5b6c4f18ad0ea1dc6d398
Reviewed-by: Timothy Gu <timothygu99@gmail.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
QCocoaMenu: Keep a reference to the containing menu item

This allows the menu to tell its containing item the menu got
deleted. This removes the need to reset the COCOA_MENU_ANCESTOR
property value, which would crash since QCocoaMenuItem::m_menu
would be a dangling pointer.

Task-number: QTBUG-41587
Change-Id: Ia3408ef85cf823bfddbc2c41d6534e43bf14ed29
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>
QMacStyle: Generalize Cocoa control rendering

So far, we were restricted by the values of ThemeButtonKind, which
consist mostly of buttons. We want to generalize to other kind of
controls when the time arrives. Already, QPushButton with pull-
down menu is not possible to get from that enum, while its easy to
get from NSPopupButton.

Task-number: QTBUG-40833
Change-Id: I244c42c42ab595f4790050eb15ade70443e155b2
Reviewed-by: Morten Johan Sørvig <morten.sorvig@digia.com>
QPlainTextEdit: Fix crash on complex undo w/full width selection

Say you have a document of two blocks of text.

When you select a block of text in the document and then replace this
with a new empty block (by pressing enter) and then subsequently
undo this action, the following three steps are performed as a
chain of undo commands:

1. Remove the empty block at the beginning of the document
2. Insert a new empty block at the beginning of the document
3. Insert the text back into the first block

Since a block is removed and inserted in the same go, both blocks
require a relayout, since the accumulated change spans both blocks.
However, in QPlainTextDocumentLayout we would only look at the max
of either removed chars or added chars. This would match the text
length of the first block at this point, so we would only relayout
that block. However, since we are also removing characters, the
actual accumulated change to the document is larger. We should
relayout any block touched by the sum of the added and removed
character counts.

Missing this, the paint event would later query
block.layout()->lineForTextPosition(0) which would give an invalid
line despite the fact that the block.length() > 0. This caused
a crash in the paint event when the full width selection was
turned on.

Note that the logic here was only recently updated to include the
removed characters at all in the logic, by the SHA1:
2983cb9531d47e5826540ca79e3066a8ed0db30c.

[ChangeLog][QPlainTextEdit] Fixed a crash when using full width
selections and issuing a complex undo command chain which removes
and inserts an empty block in one go.

Task-number: QTBUG-36415
Change-Id: Iafe8a69e455e0c713a48714f10f0cace69c84f51
Reviewed-by: Axel Rasmussen <axel.rasmussen1@gmail.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Accessibility: Fix crash with invalid QAccessibleInterface

Windows accessibility can crash if it handles an event with an invalid
QAccessibleInterface pointer (one whose object has been deleted).

Task-number: QTBUG-41597
Change-Id: Iba099f7cb732fd00f18f04bd951c6cdd94785871
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Jan Arve Sæther <jan-arve.saether@digia.com>