improve presentation of pseudo windows

src/fenrirscreenreader/commands/onCursorChange/55000-spell_check.py

@@ -57,7 +57,10 @@ class command():
             return            
         # deletion
         if self.env['runtime']['screenManager'].isNegativeDelta():
-            return             
+            # quirk for pseudo windows like finch (uses _ insteed of space in input box)
+            if self.env['screen']['newNegativeDelta'] != '_':
+                return             
+            
         # first place could not be the end of a word
         if self.env['screen']['newCursor']['x'] == 0:
             return

src/fenrirscreenreader/core/screenManager.py

@@ -169,7 +169,7 @@ class screenManager():
                 else:
                     # cleanup scrollbars in windows to not produce wrong output
                     if ('│' in newScreenText) and ('│' in oldScreenText):
-                        for c in ['▒','↑']:
+                        for c in ['▒','↑','↓']:
                             newScreenText = newScreenText.replace(c,'')
                             oldScreenText = oldScreenText.replace(c,'')                   
                     diff = self.differ.compare(oldScreenText.split('\n'),\