Selecting text in a cell should remove other selections

[gordonwoodhull]

To enhance the illusion that a notebook is a single document, there should be only one selection and one cursor in the notebook.

Currently any selection of an inactive cell will disappear when starting a new selection automatically, because this is how the browser works.

But it's not automatic for activated cells and you can have live selections in many cells at once if they are active. This is confusing.

In addition, the cursor turns grey but it is still visible in unfocused cells, and this is distracting if there are a lot of cells in edit mode.

[gordonwoodhull]

Also the active line should not be grey if the cell does not have focus

[gordonwoodhull]

Is there a programmatic way to hide the ace cursor