* swank-loader.lisp (require-module): Make slightly more robust.
* sly.el (sly-mode-map): Incorporate old bindings from `sly-parent-map'

(sly-popup-buffer-mode-map, sly-inspector-mode-map): No longer use
`set-keymap-parent' on this map.
(sldb-mode): Enter `sly-mode' minor mode.
(sly-parent-map): delete.
* sly.el (sly-modeline-string): simplify, don't care about localness.
* sly.el (sly-generate-connection-name): simplify lisp-name if it's a file
`sly-list-connections' uses `tabulated-list-mode'

* sly.el (sly-connection-list-mode, sly-connection-at-point)
(sly--connection-at-point, sly-connection-list-button-action)
(sly-connection-list-default-action, sly-update-connection-list)
(sly-quit-connection-at-point, sly-restart-connection-at-point)
(sly-list-connections, sly-update-connection-list)
(sly-draw-connection-list)
(sly-connections-buffer-name): Update to use tabulated-list-mode
instead of home-baked listing mode.
* swank.lisp (connection-info): Fix omision in docstring.
* contrib/sly-mrepl.el (sly-mrepl): Set `sly-connetion-list-button-action'.