Explain what Yes/No means in an assert window

It's a bit confusing to get a yes/no dialogue box without any indication
of what yes or no will do in this situation, so add a short explanatory
sentence.

Source/Core/Common/Assert.h

@@ -13,7 +13,7 @@
 #define _assert_msg_(_t_, _a_, _fmt_, ...)                                                         \
   if (!(_a_))                                                                                      \
   {                                                                                                \
-    if (!PanicYesNo(_fmt_, __VA_ARGS__))                                                           \
+    if (!PanicYesNo(_fmt_ "\n\nIgnore and continue?", __VA_ARGS__))                                                           \
       Crash();                                                                                     \
   }