keybinds: changes related to lsp rename

* vim mode: bind 'grn' to rename_symbol
* flow mode: bind F4 to toggle_input_mode

src/keybind/builtin/flow.json

@@ -129,7 +129,7 @@
             ["shift+backspace", "delete_backward"],
             ["shift+tab", "unindent"],
             ["f2", "rename_symbol"],
-            ["ctrl+shift+f2", "toggle_input_mode"],
+            ["f4", "toggle_input_mode"],
             ["ctrl+f2", "insert_command_name"],
             ["f3", "goto_next_match"],
             ["f15", "goto_prev_match"],
@@ -231,7 +231,7 @@
             ["alt+i", "toggle_inputview"],
             ["alt+x", "open_command_palette"],
             ["f1", "open_help"],
-            ["f2", "toggle_input_mode"],
+            ["f4", "toggle_input_mode"],
             ["ctrl+f2", "insert_command_name"],
             ["f6", "open_config"],
             ["f9", "theme_prev"],

src/keybind/builtin/vim.json

@@ -44,6 +44,7 @@
             ["gi", "goto_implementation"],
             ["gy", "goto_type_definition"],
             ["gg", "move_buffer_begin"],
+            ["grn", "rename_symbol"],
             ["g<S-d>", "goto_declaration"],
             ["<S-g>", "move_buffer_end"],