Fix entry notes reveal button requiring two clicks sometimes

[droidmonkey]

Related to discussion in #11345

Testing strategy

Tested manually

Type of change

• ✅ Bug fix (non-breaking change that fixes an issue)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.71%. Comparing base (740994e) to head (2f80b16).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #11351      +/-   ##
===========================================
- Coverage    63.71%   63.71%   -0.00%     
===========================================
  Files          362      362              
  Lines        38000    38001       +1     
===========================================
  Hits         24211    24211              
- Misses       13789    13790       +1     

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[varjolintu]

Found this while testing this: #11352

[varjolintu]

Also found the following when debugging with ASAN enabled. Can you verify this happens to you too?

1. Edit entry, modify the note.
2. Press Apply and then OK.
3. Save the database -> ASAN hits a breakpoint.
4. If doing the same without Apply, everything is ok.

ASAN shows:

error: <user expression 1>:1:1: use of undeclared identifier 'username'    1 | username.d | ^

lldb) thread info -s
thread #7: tid = 0x2239c, 0x0000000106c65060 libclang_rt.asan_osx_dynamic.dylib`__asan::AsanDie(), name = 'Thread (pooled)', stop reason = Invalid memory access

{
  "access_size": 32,
  "access_type": 1,
  "address": 4387995934,
  "description": "unknown-crash",
  "instrumentation_class": "AddressSanitizer",
  "pc": 4408505784,
  "stop_type": "fatal_error"
}

And the call stack:

__asan::AsanDie() 0x0000000106c65060
SymmetricCipher::finish(QByteArray &) SymmetricCipher.cpp:115
SymmetricCipherStream::writeBlock(bool) SymmetricCipherStream.cpp:209
SymmetricCipherStream::reset() SymmetricCipherStream.cpp:69
Kdbx4Writer::writeDatabase(QIODevice *, Database *) Kdbx4Writer.cpp:177
KeePass2Writer::writeDatabase(QIODevice *, Database *) KeePass2Writer.cpp:140
Database::writeDatabase(QIODevice *, QString *) Database.cpp:419
Database::performSave(const QString &, Database::SaveAction, const QString &, QString *) Database.cpp:329
$_6::operator()() const Database.cpp:292