zsh vim mode update

zsh_vim_mode.txt

@@ -23,17 +23,16 @@ zle -N zle-line-init
 zle -N zle-keymap-select
 
 # add missing vim hotkeys
-# fixes backspace deletion issues
 # http://zshwiki.org/home/zle/vi-mode
 bindkey -a u undo
-bindkey -a '^R' redo
-bindkey '^?' backward-delete-char
-bindkey '^H' backward-delete-char
+bindkey -a '^T' redo
+bindkey '^?' backward-delete-char  #backspace
 
 # history search in vim mode
 # http://zshwiki.org./home/zle/bindkeys#why_isn_t_control-r_working_anymore
-bindkey -M viins '^s' history-incremental-search-backward
-bindkey -M vicmd '^s' history-incremental-search-backward
+# ctrl+r to search history
+bindkey -M viins '^r' history-incremental-search-backward
+bindkey -M vicmd '^r' history-incremental-search-backward