[Feature Request] Additional category tabs

[f1refa11]

this feature is already present in Trello, where you can create new tabs for different task statuses - for example, "To do", "In progress", "Done".

First concept of creating tabs(unfinished):

the first one expects the user to click on the plus sign to open a model dialog to create a new tab. By long-pressing an existing tab you can enable a tab edit mode, in which an edit and rearrange buttons would be present in each of sides of every tab. the rearrange button allows you to press on it and drag an entire tab anywhere else.

the drawback of this design is that the user won't really know that you can edit tabs by long-pressing the tab.

The second concept would have the tab editing menu in the category edit dialog, where the user would be able to edit, rearrange, and delete tab.