Add a Connect button next to the host field; unwire it from Start

Start/Pause/Stop on the toolbar were never about the websocket
connection - Start now does nothing until that's wired to its own
purpose, and connecting is its own explicit action next to the host
text entry.

client/brewpi.ui

@@ -3669,6 +3669,19 @@
      <string>ws://localhost:8765</string>
     </property>
    </widget>
+   <widget class="QPushButton" name="btn_connect">
+    <property name="geometry">
+     <rect>
+      <x>440</x>
+      <y>500</y>
+      <width>70</width>
+      <height>31</height>
+     </rect>
+    </property>
+    <property name="text">
+     <string>Connect</string>
+    </property>
+   </widget>
    <widget class="QLabel" name="label_8">
     <property name="geometry">
      <rect>

client/brewpi_gui.py

@@ -176,7 +176,7 @@ class Window(QtWidgets.QMainWindow, Ui_MainWindow):
 		self.msg_sud.set_recv_handler(self.on_sud_changed)
 
 		self.setupUi(self)
-		self.actionStart.triggered.connect(self.connect)
+		self.btn_connect.clicked.connect(self.connect)
 		self.actionStop.triggered.connect(self.disconnect)
 		self.actionSudDownload.triggered.connect(self.on_action_sud_download)
 		self.actionSudUpload.triggered.connect(self.on_action_sud_upload)

client/main_window.py

@@ -1227,6 +1227,9 @@ class Ui_MainWindow(object):
         self.plainTextUri = QtWidgets.QPlainTextEdit(self.centralwidget)
         self.plainTextUri.setGeometry(QtCore.QRect(270, 500, 161, 31))
         self.plainTextUri.setObjectName("plainTextUri")
+        self.btn_connect = QtWidgets.QPushButton(self.centralwidget)
+        self.btn_connect.setGeometry(QtCore.QRect(440, 500, 70, 31))
+        self.btn_connect.setObjectName("btn_connect")
         self.label_8 = QtWidgets.QLabel(self.centralwidget)
         self.label_8.setGeometry(QtCore.QRect(200, 500, 67, 31))
         self.label_8.setAlignment(QtCore.Qt.AlignCenter)
@@ -1291,6 +1294,7 @@ class Ui_MainWindow(object):
         self.label_7.setText(_translate("MainWindow", "State"))
         self.label_state.setText(_translate("MainWindow", "State"))
         self.plainTextUri.setPlainText(_translate("MainWindow", "ws://localhost:8765"))
+        self.btn_connect.setText(_translate("MainWindow", "Connect"))
         self.label_8.setText(_translate("MainWindow", "Host"))
         self.menu_File.setTitle(_translate("MainWindow", "&File"))
         self.menu_Help.setTitle(_translate("MainWindow", "&Help"))