Early termination of formatDisplayValue for bitfield

When you have a rather large recursively defined bitfield, the UI can hang for a while.
This commit makes it stop early when the string reaches 64 characters.

Author: AkiSakurai

lib/include/pl/patterns/pattern_bitfield.hpp

@@ -712,6 +712,10 @@ namespace pl::ptrn {
                 } else if (auto *bitfield = dynamic_cast<PatternBitfield *>(pattern.get()); bitfield != nullptr) {
                     valueString += fmt::format("{} = {} | ", bitfield->getVariableName(), bitfield->formatDisplayValue());
                 }
+
+                if(valueString.size() - 3 > 64) {
+                    break;
+                }
             }
 
             if (valueString.size() >= 3) {