Let (semi) colon end sentences

app/src/main/java/eu/faircode/email/Helper.java

@@ -2793,13 +2793,13 @@ public class Helper {
     }
 
     static boolean isEndChar(char c) {
-        return (isSentenceChar(c) ||
-                c == ',' || c == ':' || c == ';');
+        return (isSentenceChar(c) || c == ',');
     }
 
     static boolean isSentenceChar(char c) {
         return (c == '.' /* Latin */ ||
                 c == '。' /* Chinese */ ||
+                c == ':' || c == ';' ||
                 c == '?' || c == '!');
     }