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Attaching the PasswordToggle widget to a QLineEdit adds an icon to
temporarily make the text in the widget visible when needed.

(cherry picked from commit 05ff3958)

Attaching the PasswordToggle widget to a QLineEdit adds an icon to
temporarily make the text in the widget visible when needed.

Code based on plasma-nm passwordfield

This patch makes database support in KMyMoney optional instead of mandatory. I believe most users use XML storage, so they could switch off SQL storage  to save startup time and memory. Developers will benefit too, because they can switch off building of this plugin and save compilation time.

Following safty checks were implemented:
1) user tries to open database with SQL storage plugin switched off,
2) user opens database and switches SQL storage plugin off and tries to save his storage

I think that in future we could lower our core dependencies by droping off Qt5SQL.
I also think, that we could switch between XML and SQL on the fly.

Differential Revision: https://phabricator.kde.org/D10406

Patch aims mainly to speed up recompilation time through code
refactoring. Refactoring in this case means:
1) new syntax for signal-slot connections,
2) enums in separate header file,
3) single class in single header,
4) d-pointers,
5) single inheritance for widget classes,
6) explicit constructors,
7) less interdependency in header files,
8) override keyword for virtual functions,
9) disabling copy constructors,
10) rename kMyMoney* to KMymoney* to be consistent.

Differential Revision: https://phabricator.kde.org/D8878

Differential Revision: https://phabricator.kde.org/D8757

Patch lessens interdependency of libraries.

Minor changes in the code base. Also the layout of the dialog was
improved. However this dialog is definitely something we could replace.

svn path=/trunk/playground/office/kmymoney/; revision=1094635

svn path=/trunk/playground/office/kmymoney/; revision=1079097

Apply a unified coding style based on the kdelibs coding style but with 2 spaces indentation instead of 4. Also added the astyle-kmymoney.sh script that applies this style when run on the KMyMoney sources for later maintenance.

svn path=/trunk/playground/office/kmymoney/; revision=1079021

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