Flexible and easily modifiable toolbars & menus

This is an initial version of a proposal to include more flexible and easily modifiable toolbars & menus with KDE4. I'll be posting more mockups later on.

The basic idea is that modifying the toolbars and menus of KDE applications should be possible on an item by item basis (as opposed to the toolbar basis in KDE3) and accessible straight from the corresponding context menu.

The mockups depict a konqueror toolbar which has buttons of varying sizes, with some of them having text labels. There's also initial mockups of the toolbar context menu.

The context menu for menu items would be roughly similar, with options for adding the item to the toolbar, moving the item, adding/removing an icon for the item and shrinking/enlarging the icon for the item.

The main problem with this idea, i.e. positioning of toolbar items, could be resolved by using either separators or some sort of grid-based approach.

With separators the idea is that in horizontal toolbars the spacing between two vertical separators would be defined by the tallest item between them. Smaller items could then be placed on several rows (as shown by the forward/up buttons in the konqueror toolbar mockup) if the vertical spacing would allow it. Vertical separators could then be used to further divide the toolbar into manageable (usually context-specific) boxes.

The same would obviously go for vertical toolbars, with the obvious difference that the widest item would define the spacing between vertical separators and horizontal separators would be used for further division.

Initial version

TODO:
- Mockup of context menu for menu items
- More toolbar examples