Bugfix: bring back the insert mode cursor (#1476)

Author: glennsl

src/Feature/Editor/CursorView.re

@@ -6,6 +6,7 @@ let render =
     (
       ~context: Draw.context,
       ~buffer,
+      ~mode: Vim.Mode.t,
       ~isActiveSplit,
       ~cursorPosition: Location.t,
       ~theme: Theme.t,
@@ -48,6 +49,9 @@ let render =
         ~height,
         ~color=foreground,
       );
+    } else if (mode == Insert) {
+      let width = 2.;
+      Draw.rect(~context, ~x, ~y, ~width, ~height, ~color=foreground);
     } else {
       let width = float(characterWidth) *. context.charWidth;
       Draw.rect(~context, ~x, ~y, ~width, ~height, ~color=foreground);

src/Feature/Editor/EditorSurface.re

@@ -204,6 +204,7 @@ let make =
       definition
       bufferSyntaxHighlights
       bottomVisibleLine
+      mode
       isActiveSplit
       gutterWidth
       bufferWidthInCharacters={layout.bufferWidthInCharacters}

src/Feature/Editor/SurfaceView.re

@@ -63,6 +63,7 @@ let%component make =
                 ~definition,
                 ~bufferSyntaxHighlights,
                 ~bottomVisibleLine,
+                ~mode,
                 ~isActiveSplit,
                 ~gutterWidth,
                 ~bufferWidthInCharacters,
@@ -180,6 +181,7 @@ let%component make =
         CursorView.render(
           ~context,
           ~buffer,
+          ~mode,
           ~isActiveSplit,
           ~cursorPosition,
           ~theme,