Remove constrained view in the 2D editor

We initially added an option to disable constraining the 2D editor view.
This setting was still enabled by default to avoid confusing users
who end up scrolling too far away from their current scene
(which is a problem if you don't know about the F key to focus
on the selection).

However, it's probably a better choice to unconstrain the 2D editor view
by default because:

- Lots of people don't know about this setting and wonder how they
  can scroll far away from the scene. This feels really limiting for them,
  and it can even lead to some people thinking Godot intentionally limits
  scene sizes.
- The 3D editor doesn't have such a contrain mechanism.
  This makes the 2D editor more consistent with the 3D editor.

0 files changed, 0 insertions, 0 deletions