tmux: Reorder prefix setting to top of bindings

.config/tmux/tmux.conf

@@ -16,6 +16,11 @@ set -g copy-command 'xclip -selection clipboard'
 # https://github.com/neovim/neovim/wiki/FAQ#cursor-shape-doesnt-change-in-tmux
 set -ga terminal-overrides '*:Ss=\E[%p1%d q:Se=\E[ q'
 
+# Set C-a as new prefix
+unbind C-b
+set -g prefix C-a
+bind C-a send-prefix
+
 # Copy selection into primary selection (without aborting)
 bind -T copy-mode-vi MouseDragEnd1Pane send -X copy-pipe-no-clear "xclip -se p"
 
@@ -67,11 +72,6 @@ bind -T copy-mode-vi WheelDownPane \
 		send -XN5 scroll-down
 	}
 
-# Set C-a as new prefix
-unbind C-b
-set -g prefix C-a
-bind C-a send-prefix
-
 # Split panes with > and <
 unbind %
 bind < splitw -v -c "#{pane_current_path}"