Fixed uinstaller issues:
1. Folder "localization" is not removed even all the files are removed from
this folder.
2. Folder "pluging\APIs" is not removed even all the files are removed from
this folder.
3. Three files are not removed (contextMenu.xml, functionList.xml and
shortcuts.xml). There might be more files.
From "%appdata%\Notepad"
4. Bakcup folder (form %appdata%\Notepad++) is not removed if backup folder
is not empty.
5. Folder "themes" is not removed even all the files are removed.
6. Because of above two items, parent folder ("%appdata%\Notepad") is also
not removed.
7. Rephrase user message when user tries to install 64 bit while 32 is
already installed (vice versa).
Closes#2565
64-bit Installer can detect the 32-bit installation (and vice versa),
and suggest users to remove the existing one before install the new one.
It works only when the existing installation is on "C:\Program Files
(x86)\Notepad++" or "C:\Program Files\Notepad++" directory
After uninstalling 64-bit Notepad++ via uninstaller, the entry remains in
the "uninstall programs" section of panel of configuration. This commit fixes the bug.
