Polygon Lasso mode uses the wrong icons

[michaelgundlach]

A quick addendum to #1096 (Polygon Sasso Select).

The freeform vs polygon icons are inappropriate for a few reasons:

1. Because it contains straight lines, you cannot draw the current Freeform icon in Freeform mode, unless you have a very steady hand :)
2. One icon uses dashed lines and one uses solid lines, implying a difference that doesn't exist. If anything, solid lines convey the solidity of Polygon mode, but currently it's the Freeform icon using dashed lines.
3. The current Polygon icon is an irregular star shape, which (to me) conveys the mouse-jiggling nature of Freeform mode.

I'd suggest one of two fixes:

1. (probably better) Since we already have a big word "Replace" showing in the Selection dropdown, the user is already processing the tool settings textually; so just replace the icons with the text "Freeform" or "Polygon".

2. Replace the Freeform icon with an amoeba-looking icon made of dashed curved lines, and replace the Polygon icon with an irregular convex polygon made of dashed lines.

[cameronwhite]

These are good points - @PabloRufianJimenez any thoughts on this?

My two cents:

• Dashed lines should be used to indicate a selection, like the icon for the rectangle select tool
• I don't mind the suggestion for just using text here, but otherwise I agree with having a more organic shape for the freeform mode