Enhancement: let user configure to open links in same tab instead on a new window/tab

[MaybeThisIsRu]

My use-case: I use my linkding site as the default new tab page. I would like to quickly search and open a link in the same tab.

Currently, clicking a link opens a new tab and I'm left with the new tab that I had opened with linkding, as well as the actual link I wanted to open in another new tab.

This actually involves two facets once a user configures these:

1. autofocus on the linkding search bar
2. update the target values on the linkding bookmark entries to open in current tab

[sissbruecker]

Seems reasonable, I'm going to take a stab at this at some point.

[Export33]

Adding an autofocus to the forminput is easily made and i like the idea.

Changing the default link opening could be impemented with #76 .

[sissbruecker]

Added a user profile setting for opening bookmarks either in a new page, or in the same page.

Decided against setting autofocus on the search box for now, as these two features are not necessary related. A recent addition (#161) allows to focus the search box by pressing s, as long as the page has focus, so there is a reasonable workaround.

With regards to the original request of using linkding as the new tab page, and focusing the search box, I'm having a bit trouble to understand how one would work with that setup. Usually in new tabs I want to trigger a web search, so I want to focus the browsers address bar, rather than an input in the new tab page. I found the idea interesting though, so I added an alternative to the linkding browser extension (sissbruecker/linkding-extension#9). The extension now integrates with the address bar / omnibox, so that you can search for bookmarks stored in linkding from the address bar. To do so, enter ld, followed by Space, and then enter the search term. The address bar will now suggest bookmarks from linkding. The default suggestion will simply open linkding in the current tab, and trigger a search for the entered search term. Combined with the new setting introduced here that could be a good alternative.

The update is released for Firefox, Chrome is still pending.