create classifying link between open editors

It would be nice, if the open editors could be classified, so that they don't show all the same files.

For example the editor is splitted into 4 parts, now all showing the same source. All editors are numbered.
On close coupled sources like .h and .c it would be nice to add some kind of dynamic filter: Context operation on editor #1 - this editor is "header-editor" for editor #3.

Then the following happens:

• the filelist of editor #1 is filtered to show only .h
• the filelist of editor #3 is filtered to show only .c
• when editor #1 is active and the cursor is inside a class declaration, editor #3 loads the source-file, that shows the definitions for that class
  Really great would be the context-linking, that editor #3 shows the definition for the function, the cursor is on editor #1
• same should work, if edtior #3 is active. Whatever source is shown, editor #1 should load the file containing the appropriate declaration.

If other filetypes exists, that are similarly close coupled that .h and .c - the filter should work there too.