Default file type when adding files to a project

[dgrunwald]

SD-1906, originally created on 5/29/2012 20:42:56 by Matt Ward

Currently the default file type used in the OpenFileDialog is whatever
is first in the list of file filters.

Possible enhancement:

1. Configurable default file filter. Project type specific?
2. Save the last filter used and set it again when the OpenFileDialog
   is used.

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Comment from Daniel Grunwald on 5/29/2012 20:45:03:
We could also generate an entry 'all supported file types' and select
that by default.

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Comment from Matt Ward on 6/29/2013 22:11:56:
All supported file types has been added to SharpDevelop 5 when opening
files but not when adding files to a project.

Looking at the code the original behaviour was to select the file
extension that was associated with the project binding. However the
comparison incorrectly matches .cshtml for C# project files instead of
matching .cs files.

https://github.com/icsharpcode/SharpDevelop/blob/master/src/Main/Base/Project/Src/Gui/Pads/ProjectBrowser/Commands/FolderNodeCommands.cs#L51

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Comment from Daniel Grunwald on 6/30/2013 00:18:09:
I think the best solution is to remove the matching logic and use the
'all supported file types' filter instead.
Even if we fix the matching logic to use *.cs for C# projects; that
still wouldn't show *.xaml files which are also valid in C# projects.