(gdb-breakpoints-mode-map)

(gdb-breakpoints-mode-map)
(gdb-frames-mode-map, gdb-threads-mode-map)
(gdb-registers-mode-map, gdb-locals-mode-map)
(gdb-assembler-mode-map): Bind "q" to kill-this-buffer.
(dedicated-switch-to-buffer): Rename to gdb-set-window-buffer.
(dedicated-switch-to-buffer): Rework.
(gdb-var-evaluate-expression-handler, gdb-put-string):
Remove unused variable bindings.
(gdb-setup-windows, gdb-display-buffer):
Simplify. Use pop-to-buffer.
(gdb-view-source-function): Simplify.
(gdb-frame-breakpoints-buffer):
Use pop-to-buffer, special-display-regexps.