Make TEXTAREA mode more vim-like.

When entering textarea mode, move cursor back one character. This is
like exiting insert mode and going back to normal mode in vim.
Make 'f' and 't' be closer to vim. 'f' goes to right before the
character and 't' being one character before that.

Author: gkatsev

common/content/editor.js

@@ -679,7 +679,11 @@ const Editor = Module("editor", {
 
         mappings.add([modes.INSERT],
             ["<C-t>"], "Edit text field in Vi mode",
-            function () { liberator.mode = modes.TEXTAREA; });
+            function () {
+                let edtr = Editor.getEditor();
+                edtr.setSelectionRange(edtr.selectionStart - 1, edtr.selectionStart - 1);
+                liberator.mode = modes.TEXTAREA;
+            });
 
         mappings.add([modes.INSERT],
             ["<Space>", "<Return>"], "Expand insert mode abbreviation",
@@ -812,7 +816,7 @@ const Editor = Module("editor", {
             function (count, arg) {
                 let pos = editor.findCharForward(arg, count);
                 if (pos >= 0)
-                    editor.moveToPosition(pos, true, liberator.mode == modes.VISUAL);
+                    editor.moveToPosition(pos - 1, true, liberator.mode == modes.VISUAL);
             },
             { arg: true, count: true });
 
@@ -830,7 +834,7 @@ const Editor = Module("editor", {
             function (count, arg) {
                 let pos = editor.findCharForward(arg, count);
                 if (pos >= 0)
-                    editor.moveToPosition(pos - 1, true, liberator.mode == modes.VISUAL);
+                    editor.moveToPosition(pos - 2, true, liberator.mode == modes.VISUAL);
             },
             { arg: true, count: true });