## Fix: Error in Node Wrangler UI when in Sequencer mode
Node Wrangler tried to find the current scene compositing node tree,
even when there was none. This could happen if working on a sequencer
compositing modifier.
This commit hides the Save This Image button when not in Scene
compositing mode.
## Fix: Error in Node Wrangler's Save Image op when file path is empty
If the file path is empty in Save Image operator, it returns `None`
and errors out.
This commit makes it return `{'CANCELLED'}` early in that case.
## Add webp to list of file formats for Save Viewer
## Fix: Error when Viewer Node image renamed and saved
The "Viewer Node" image that contains the current compositing node
tree's viewer data has a hardcoded name by default. However it can be
renamed by the user, which will make the Save Viewer operator fail.
This commit extracts a utility function to get the current viewer
image based on its properties, and simply saves that.
In addition, this avoids having to change the area type to an image
editor to get the current viewer node, and restoring the node editor
afterwards. This action did not restore the current node tree if the
editor was inside a node group.
## Rename "Save This Image" to "Save Viewer Image"
When calling the operator through Menu Search, it is not clear what
"Save This Image" refers to. This commit renames the operator to "Save
Viewer Image", but keeps the old name for the button label.
Pull Request: https://projects.blender.org/blender/blender/pulls/147085
8b351bdee8