Create icons for toggling the particle view in puppet

Create icons for toggling the particle view on or off in 3D View.

The normal icon 1x size is 16x16 pixels and the 2x size (which gets used on 4k displays) is 32x32 pixels. Bit depth is 8 and they are grayscale masks. The background dark and light color comes from the code.

4 icons are needed in total

• 16x16 for 'off' state (particles_off.png)

• 32x32 for 'off' state (particles_off@2x.png)

• 16x16 for 'on' state (particles_on.png)

• 32x32 for 'on' state (particles_on@2x.png)

The icon is placed on the top right corner next to the refresh button,  and is togglable (see particles_icon_puppet.png).

 'On' state has darker background (see particles_icon_on.png)

 'Off' state background is the color of the menu bar (see particles_icon_off.png)

The function of this toggle button is to enable or disable particle animations in the 3D editor.