Missing table features

[erichartline]

Needed features:

• Add table width / size Add table width / size and line editing dicty-frontpage#121
• Change column width to make asymmetric table Change column width to make asymmetric table dicty-frontpage#124
• Allow table lines to be white or invisible Allow table lines to be white or invisible dicty-frontpage#129 make table lines to select being invisible #758

[erichartline]

Initial implementation has been added. Still need to add the above features + clean up the UI of the toolbar. The insert/delete rows/columns buttons should only be visible if the current selection is inside a table. We should also have a modal to let the user specify the border color.

Tests still need to be included.

[erichartline]

The UI for the toolbar table buttons is cleaned up. However, the requested features still need to be added.