fix: prevent tooltip widget from covering toolbar buttons (#2222)

lib/pangea/toolbar/widgets/message_selection_positioner.dart

@@ -523,24 +523,20 @@ class MessageSelectionPositionerState extends State<MessageSelectionPositioner>
                 );
               },
             ),
-          MeasureRenderBox(
-            onChange: _setTooltipSize,
-            child: Positioned(
-              top: 0,
-              left: 0,
-              child: Opacity(
-                opacity: 0.0,
-                child: Container(
-                  constraints: const BoxConstraints(
-                    minWidth: 200.0,
-                    maxWidth: 400.0,
-                  ),
-                  child: InstructionsInlineTooltip(
-                    instructionsEnum:
-                        widget.overlayController.toolbarMode.instructionsEnum ??
-                            InstructionsEnum.readingAssistanceOverview,
-                    bold: true,
-                  ),
+          Positioned(
+            top: 0,
+            child: MeasureRenderBox(
+              onChange: _setTooltipSize,
+              child: Container(
+                constraints: const BoxConstraints(
+                  minWidth: 200.0,
+                  maxWidth: 400.0,
+                ),
+                child: InstructionsInlineTooltip(
+                  instructionsEnum:
+                      widget.overlayController.toolbarMode.instructionsEnum ??
+                          InstructionsEnum.readingAssistanceOverview,
+                  bold: true,
                 ),
               ),
             ),

lib/pangea/toolbar/widgets/word_zoom/morph_focus_widget.dart

@@ -1,6 +1,10 @@
 // stateful widget that displays morphological label and a shimmer effect while the text is loading
 // takes a token and morphological feature as input
 
+import 'package:flutter/material.dart';
+
+import 'package:flutter_gen/gen_l10n/l10n.dart';
+
 import 'package:fluffychat/pangea/analytics_details_popup/analytics_details_popup.dart';
 import 'package:fluffychat/pangea/analytics_details_popup/morph_meaning_widget.dart';
 import 'package:fluffychat/pangea/analytics_misc/construct_type_enum.dart';
@@ -21,8 +25,6 @@ import 'package:fluffychat/pangea/morphs/morph_repo.dart';
 import 'package:fluffychat/pangea/morphs/morph_tag_display.dart';
 import 'package:fluffychat/pangea/toolbar/widgets/message_selection_overlay.dart';
 import 'package:fluffychat/widgets/future_loading_dialog.dart';
-import 'package:flutter/material.dart';
-import 'package:flutter_gen/gen_l10n/l10n.dart';
 
 class MorphFocusWidget extends StatefulWidget {
   final PangeaToken token;