[Widget] Optimize list, and modify the List Widget

[wuyongfeng]

To optimize the list based on the issues raised by zhizhangchen

[grgustaf]

I wonder if you could make a video of how this is supposed to work and what you can actually do? I'm finding it very difficult to find what items I can add to a given list after I create one, although I can at least copy and paste more items into it.

Here are some bugs:

• The capitalization of "List Views" in the CATEGORIES view should not change. Everything there uses initial caps.
• The Buttons in a ButtonList should not have the text "Button", it makes it look like they are normal buttons, but they're not. I guess it could say "List Button".
• If Lists are now going to have three items by default (which seems great), then OrderedList should as well.
• Something is very weird when the palette item "List Button" cannot be dropped into a ButtonList, but "Button List Item" can, and when it is, the object is called "List Button".
• Button List Item should show an arrow in the palette icon. The text is too long though, so probably using "List Button" for this is better.
• Text on some list item types is too long and spills out of the palette icon

It seems like there are way too many different list types, so this is pretty confusing. I very much like being able to drop in a list though and instantly have existing items. For example, the thumbnail list. Probably there should not be separate "ThumbnailList", "SimpleList", "IconSplitList", etc, but one core List class.

Or maybe it is a good idea to have all these types, but then the items within them should be much simpler... for instance, a single "List Item" on the palette can be dropped into any of the types, and creates a new item of the right type for that list. That would encourage the users to keep the list items consistent which is probably a good idea, even though it's valid in jQuery to mix buttons, split buttons, icon list items, etc.

Anyway, it's definitely very helpful and necessary to see all of this done like it is. We maybe need to have another experiment in parallel to see what it would be like to do more generic list/item widgets, and then compare the two approaches hands-on.

[wuyongfeng]

"Here are some bugs"

Button List Item and List Button hierarchy, so we can not merge.

[wuyongfeng]

Re-modified according to the requirements of

[wuyongfeng]

Modify the svg picture

[wuyongfeng]

Re-edit the picture problem

[zhizhangchen]

The three commits relating to list can be merged into one commit.