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This fixes the unfiled bug reported by oslomp.

The escape binding completely erases the query field and has the
UI return to the queue window. This is similar to the behaviour
that the escape key has in vim.

Fixes #19

Fixes #20

which swaps the last two characters in the current query.

Fixes #18.

This is to guarantuee that we do not make any changes that will
implicitly add a destructor to Song.

Fixes #10

Finish the fix for #2

Closes #2

See merge request !2

Fixes #2 (together with c307485c)

See also #2

Refactor the code

See merge request !1

See #10

Fixes #17

This commit changes the behavior of fetch_queue_loop to drop the
old http client and reconstruct a new one when there have been too
many (>= 3) failed attempts to fetch the queue.