[FIX] web_editor: correctly set image on double click

Commit 321486851a fixed double click on media dialog when multiple selection is
allowed.
Still, it needs a deeper fix to ensure that the image is/remains selected when
double clicking no matter it's state (selected or not) before the clicks.
Double click should always force the image to be selected before saving.

Step to reproduce:
  - Drop the Image Gallery snippet
  - Open new images manager (Customize > Add images or Add Images directly if no
    images set yet
  - Select an image (simple click)
  - Now double click on it

It won't set the image since when double clicking, it:
1. Unselected the image on the first click (click event)
2. Selected the image on the second click (click event)
3. Unselected the image and saved (dblclick event)

0 files changed, 0 insertions, 0 deletions