Fix update problems in AZ.

Fixes #1486
Connect requires peer by default.

alethzero/Connect.cpp

@@ -38,13 +38,14 @@ Connect::~Connect()
 
 void Connect::setEnvironment(QStringList const& _nodes)
 {
-	ui->host->addItems(_nodes);
+	if (ui->host->count() == 0)
+		ui->host->addItems(_nodes);
 }
 
 void Connect::reset()
 {
 	ui->nodeId->clear();
-	ui->required->setChecked(false);
+	ui->required->setChecked(true);
 }
 
 QString Connect::host()

alethzero/Connect.ui

@@ -59,6 +59,9 @@
        <property name="text">
         <string>Required (Always Connect to this Peer)</string>
        </property>
+       <property name="checked">
+        <bool>true</bool>
+       </property>
        <property name="tristate">
         <bool>false</bool>
        </property>

alethzero/MainWin.cpp

@@ -285,7 +285,7 @@ void Main::onKeysChanged()
 
 unsigned Main::installWatch(LogFilter const& _tf, WatchHandler const& _f)
 {
-	auto ret = ethereum()->installWatch(_tf);
+	auto ret = ethereum()->installWatch(_tf, Reaping::Manual);
 	m_handlers[ret] = _f;
 	_f(LocalisedLogEntries());
 	return ret;

libethereum/ClientBase.cpp

@@ -265,7 +265,8 @@ LocalisedLogEntries ClientBase::peekWatch(unsigned _watchId) const
 //	cwatch << "peekWatch" << _watchId;
 	auto& w = m_watches.at(_watchId);
 //	cwatch << "lastPoll updated to " << chrono::duration_cast<chrono::seconds>(chrono::system_clock::now().time_since_epoch()).count();
-	w.lastPoll = chrono::system_clock::now();
+	if (w.lastPoll != chrono::system_clock::time_point::max())
+		w.lastPoll = chrono::system_clock::now();
 	return w.changes;
 }
 
@@ -278,8 +279,9 @@ LocalisedLogEntries ClientBase::checkWatch(unsigned _watchId)
 	auto& w = m_watches.at(_watchId);
 //	cwatch << "lastPoll updated to " << chrono::duration_cast<chrono::seconds>(chrono::system_clock::now().time_since_epoch()).count();
 	std::swap(ret, w.changes);
-	w.lastPoll = chrono::system_clock::now();
-	
+	if (w.lastPoll != chrono::system_clock::time_point::max())
+		w.lastPoll = chrono::system_clock::now();
+
 	return ret;
 }