Try to fix RemoveTextForHI webvtt issue - thx Manujito :)

Work on #9146

Author: niksedk

src/libse/Common/StrippableText.cs

@@ -93,6 +93,21 @@ public StrippableText(string input, string stripStartCharacters, string stripEnd
                             Post = text.Substring(text.Length - 7) + Post;
                             text = text.Substring(0, text.Length - 7);
                         }
+
+                        if (text.EndsWith('>'))
+                        {
+                            var lastIndexOfStart = text.LastIndexOf("<");
+                            if (lastIndexOfStart >= 0)
+                            {
+                                var tag = text.Substring(lastIndexOfStart);
+                                tag = tag.TrimStart('<').TrimEnd('>');
+                                if (tag.StartsWith("/c.", StringComparison.Ordinal) && !tag.Contains(' ') && !tag.Contains('\n'))
+                                {
+                                    Post = text.Substring(lastIndexOfStart) + Post;
+                                    text = text.Substring(0, lastIndexOfStart);
+                                }
+                            }
+                        }
                     }
                 }
                 while (text.Length < beginLength);

src/ui/Logic/CommandLineConvert/CommandLineConverter.cs

@@ -2223,8 +2223,8 @@ internal static Subtitle RunActions(TextEncoding targetEncoding, Subtitle sub, S
 
                                 break;
                             case BatchAction.RemoveTextForHI:
-                                var hiSettings = new Core.Forms.RemoveTextForHISettings(sub);
-                                var hiLib = new Core.Forms.RemoveTextForHI(hiSettings);
+                                var hiSettings = new RemoveTextForHISettings(sub);
+                                var hiLib = new RemoveTextForHI(hiSettings);
                                 var lang = LanguageAutoDetect.AutoDetectGoogleLanguage(sub);
 
                                 var index = sub.Paragraphs.Count - 1;