Current annotation tools lack the ability to insert a little '^' shape.

It should work as follows:

- When selected, one should have the 'text' cursor, like for the highlight annotation tool
- Clicking should insert the 'caret' shape with a fixed size just slightly smaller than a character.
- Insertion point should be such that the upper corner of the caret has x coordinate equal to the x coordinate of the cursor and y coordinate equal to the baseline of the character to the left of the cursor.

Please see the screenshot from foxit pdf reader that implements this feature correctly.

Reproducible: Always