scripted-diff: rename NetPermissionFlags enumerators

- drop redundant PF_ permission flags prefixes
- drop ALL_CAPS naming per https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Renum-caps
- rename IsImplicit to Implicit

-BEGIN VERIFY SCRIPT-
s() { git grep -l "$1" src | xargs sed -i "s/$1/$2/g"; }

s 'PF_NONE'        'None'
s 'PF_BLOOMFILTER' 'BloomFilter'
s 'PF_RELAY'       'Relay'
s 'PF_FORCERELAY'  'ForceRelay'
s 'PF_DOWNLOAD'    'Download'
s 'PF_NOBAN'       'NoBan'
s 'PF_MEMPOOL'     'Mempool'
s 'PF_ADDR'        'Addr'
s 'PF_ISIMPLICIT'  'Implicit'
s 'PF_ALL'         'All'
-END VERIFY SCRIPT-

src/qt/rpcconsole.cpp

@@ -1062,7 +1062,7 @@ void RPCConsole::updateDetailWidget()
     ui->peerSubversion->setText(QString::fromStdString(stats->nodeStats.cleanSubVer));
     ui->peerConnectionType->setText(GUIUtil::ConnectionTypeToQString(stats->nodeStats.m_conn_type, /* prepend_direction */ true));
     ui->peerNetwork->setText(GUIUtil::NetworkToQString(stats->nodeStats.m_network));
-    if (stats->nodeStats.m_permissionFlags == NetPermissionFlags::PF_NONE) {
+    if (stats->nodeStats.m_permissionFlags == NetPermissionFlags::None) {
         ui->peerPermissions->setText(ts.na);
     } else {
         QStringList permissions;