FDO#75755: Change string "..." to "Servers..."

Change string "..." to "Servers..." in filepicker, to allow better understandng of the remote acess to file services.

Change-Id: I8ffca698b40d23b1c876223ef98f9bcb181791a4
Reviewed-on: https://gerrit.libreoffice.org/8452
Tested-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>
Reviewed-by: Marcos Paulo de Souza <marcos.souza.org@gmail.com>