Update documentation

docs/taskwarrior-tui.1.md

@@ -126,6 +126,54 @@ Ctrl-y
 : help                              - Help menu
 
 
+Keybindings for filter / command prompt:
+
+`Ctrl + f | Right`
+: move forward                      - Move forward one character
+
+`Ctrl + b | Left`
+: move backward                     - Move backward one character
+
+`Ctrl + h | Backspace`
+: backspace                         - Delete one character back
+
+`Ctrl + d | Delete`
+: delete                            - Delete one character forward
+
+`Ctrl + a | Home`
+: home                              - Go to the beginning of line
+
+`Ctrl + e | End`
+: end                               - Go to the end of line
+
+`Ctrl + k`
+: delete to end                     - Delete to the end of line
+
+`Ctrl + u`
+: delete to beginning               - Delete to the beginning of line
+
+`Ctrl + w`
+: delete previous word              - Delete previous word
+
+`Alt + d`
+: delete next word                  - Delete next word
+
+`Alt + b`
+: move to previous word             - Move to previous word
+
+`Alt + f`
+: move to next word                 - Move to next word
+
+`Alt + t`
+: transpose words                   - Transpose words
+
+`Up`
+: scroll history                    - Go backward in history matching from beginning of line to cursor
+
+`Down`
+: scroll history                    - Go forward in history matching from beginning of line to cursor
+
+
 Keybindings for context switcher:
 
 `j`