Make keymap infos consistent

In Blender, when using tools, the way their keymap information is displayed changes from tool to tool.

For some it's in the Status Bar , for others in the Header . Some buttons have a dedicated icon, some don't.

Status Bar (with icons) Status Bar (no icons) Header (no icons)

And in the case of e.g. the Knife tool , it's an actual sentence.

I think all of these should be made visually consistent for all tools and editors.