Revert "Remove theme and key map references"

This reverts commit 4a9992280bae1ae5537deb7efba7f956bd616a0e.

Reason for revert: <INSERT REASONING HERE>

Change-Id: Iaf6859b4dd31226d9ad09c363616561903281749

gr-editor/gr-editor.js

diff --git a/gr-editor/gr-editor.js b/gr-editor/gr-editor.js
index 5201a2d..58826c5 100644
--- a/gr-editor/gr-editor.js
+++ b/gr-editor/gr-editor.js
@@ -63,8 +63,7 @@
         params.hideTopMenu = prefs.hide_top_menu;
         params.indentUnit = prefs.indent_unit;
         params.indentWithTabs = prefs.indent_with_tabs;
-        // TODO(kaspern): Add support for keymaps.
-        // params.keyMap = prefs.key_map_type.toLowerCase();
+        params.keyMap = prefs.key_map_type.toLowerCase();
         params.lineLength = prefs.line_length;
         params.lineNumbers = prefs.hide_line_numbers;
         params.lineWrapping = prefs.line_wrapping;
@@ -79,7 +78,6 @@
         params.showTrailingSpace = prefs.show_whitespace_errors;
         params.styleSelectedText = true;
         params.tabSize = prefs.tab_size;
-        // TODO(kaspern): Add support for themes.
         params.theme = prefs.theme.toLowerCase();
 
         if (value && value.includes('\r\n')) {