SWF Viewer - Replace reset viewport button by autofit

Motivation

The mediators widget, located at screen bottom right, provides:

• Scalin buttons (level up/level down/levels dropdown)
• A button for "resetting" the viewport (which just resets the transform matrix, scale=1 translate = [0,0])

As a result from a UX analysis, also after implementing KOGITO-7108 (autofit to canvas size by default), the conclusion is that the "reset" viewport button does helps in the user navigation through the workflow.

Goal

Replace the "reset" viewport button by the ability to autofit to canvas size. It will allow faster user navigation, specially after initially auto fitting the size by default.

Actions:

• [UX + Eng.] Need for a replacement for the reset icon by some new one that points the autofit
• [Eng. ]Replace logic for reset viewport for the autofit one