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To avoid having to constantly drag pages around, some (unobstrusive for "casual" mouse users) advanced page selection actions should be possible.

• When the page is not selected, holding shift or control while left-clicking it will select it.
• If it's already selected, performing the above will de-select it.

If pages are selected, right-clicking one of those will prompt a different context menu with:

• Multi-delete (no confirmation)
• Move to new group

Additionally, global key listeners will respond to the following events:

• Enter key is pressed while pages are selected: The pages are moved to a new group.
• Delete key is pressed while pages are selected: The pages are deleted (no confirmation).

These features should also be documented for the user in the context of #13.

Self-explanatory. Currently, it's not possible to drop pages onto collapsed groups, which should be added since it's a fairly intuitive action.

Currently it's a bit bothersome to navigate the application with the keyboard (specifically the tab-button). This could be made more intuitive by allowed the tab button to directly focus the name inputs of the groups.

On devices that support both touch and mouse, the app will default to only supporting touch, resulting in mouse-dragging being not possible.

Currently the "options" menu only consists of a single toggle switch, with a semi-hidden description as a tooltip.
A better design choice would be a toolbar that users can use to adjust export settings.

Currently when importing files, the extension ".pdf" sticks to the group name after importing. This should be removed, since ".pdf" will be added the file name again regardless.

Currently, the application works well on desktops and tablets (landscape), but is untested with mobile devices and in portrait mode in general, resulting in a bad user experience on smaller screen.

This should be solved using media queries and proper flexbox usage.

Description

When re-arranging pages in groups that have been added via the "add group" button (not the drag-drop-field), the pages cannot be placed on indices other than 0.

Steps to reproduce

1. Import a new document.
2. Add new group via the "add group" button.
3. Attempt to drop new pages in the group, or re-arrange them after dropping them.

Since the entire feature set is not immediately shown, a seperate guide/docs page should be made that (briefly) explains the features that are possible to use with the application.

Currently it's hard to identify pages if they are rendered with small sizes. Therefore, it should be possible to preview a page by clicking on it.

Self explanatory. The initial mode for this should be determined by the browser's preferred colour scheme. A toggle for this should also be available somewhere on the site.