Re-Import of multiple image files fails

[SebieF]

Godot version:
Godot_v3.2.1-stable (Steam) and also in Mono Version

OS/device including version:
Windows 10

Issue description:
When selecting the "Import" tab next to the "Scene" tab, it's easy to re-import a single file. Thus, when having selected multiple files, the re-import option is also available, but fails for every type (Any type -> Any type, e.g. Texture -> Image).

Only output produced in the console is:
C:\Program Files (x86)\Steam\steamapps\common\Godot Engine/editor_data/projects/BugTest-35d503ddec07605593a9ad447e692fea/filesystem_update4

When changing .ogg Loop Offset for example, this works also for multiple files. I think the bug may be caused because Godot has to restart upon re-import image files.

Steps to reproduce:

1. Start a new project
2. Add 2 or more image files (.png/.jpg/etc. doesn't matter)
3. Try to re-import them into another type
4. Godot shows that it's working and restarts, but then all of the files are not re-imported

[Calinou]

Maybe this is because there's no checkbox besides the type option? When you select multiple files in the FileSystem dock, you can see a checkbox to the left of each option in the Import dock. You need to check it to apply changes when reimporting. If you don't, the property will be left unchanged on the selected files. (This is to allow mixed values when you don't want to change them.)

[SebieF]

When reimporting multiple images as the same type with a checkbox selected and a value change made, it works indeed, but re-import as another type also with any checkbox selected does not work..