Add documentation for multi-edit

website/site/content/docs/webapp/multiedit.md

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+title = "Multi Edit"
+weight = 25
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+
+## Toggle Selection Mode
+
+Docspell allows to edit and delete multiple items. Search the items
+you want to edit or delete and then select them by changing into
+"select mode". This changes the view slightly by adding a menu to the
+main area and the item cards contain a check box:
+
+{{ figure(file="multiedit-01.png") }}
+
+Then select items by clicking on the card. You can also change the
+search form and add more items to the selection. The top left shows
+how many items are selected and allows to select and deselect all
+visible items. Selected items are displayed in a different color.
+
+{{ figure(file="multiedit-02.png") }}
+
+
+## Choose an Action: Edit
+
+Once all desired items are selected, choose an action. Currently you
+can edit or delete them. When clicking "edit", the left side menu
+changes to a form for changing the metadata:
+
+{{ figure(file="multiedit-03.png") }}
+
+Changing the metadata in that form immediately applies it to all
+selected items. You can change the selection anytime.
+
+{{ figure(file="multiedit-04.png") }}
+
+
+If you are done, just click on the icon from the beginning to go back
+to "normal" mode.
+
+{{ figure(file="multiedit-05.png") }}
+
+## Choose an Action: Delete
+
+When choosing the delete action, a confirmation dialog shows up. If
+you confirm the deletion, then all selected items are deleted at the
+server and the view is switched back to normal mode afterwards. Note
+that deleting a lot of items may take a while to finish.
+
+{{ figure(file="multiedit-06.png") }}