Add tooltips, make "amount" entry consistent in Options dialog

gui/forms/addressbookdialog.ui

@@ -17,9 +17,12 @@
    <item>
     <widget class="QTabWidget" name="tabWidget">
      <property name="currentIndex">
-      <number>1</number>
+      <number>0</number>
      </property>
      <widget class="QWidget" name="sendTab">
+      <property name="toolTip">
+       <string/>
+      </property>
       <attribute name="title">
        <string>Sending</string>
       </attribute>
@@ -43,6 +46,9 @@
       </layout>
      </widget>
      <widget class="QWidget" name="receiveTab">
+      <property name="toolTip">
+       <string/>
+      </property>
       <attribute name="title">
        <string>Receiving</string>
       </attribute>
@@ -97,6 +103,9 @@
      </item>
      <item>
       <widget class="QPushButton" name="newAddressButton">
+       <property name="toolTip">
+        <string>Create a new address</string>
+       </property>
        <property name="text">
         <string>&amp;New Address...</string>
        </property>
@@ -104,6 +113,9 @@
      </item>
      <item>
       <widget class="QPushButton" name="copyToClipboard">
+       <property name="toolTip">
+        <string>Copy the currently selected address to the system clipboard</string>
+       </property>
        <property name="text">
         <string>&amp;Copy to Clipboard</string>
        </property>
@@ -111,6 +123,9 @@
      </item>
      <item>
       <widget class="QPushButton" name="editButton">
+       <property name="toolTip">
+        <string>Edit the currently selected address</string>
+       </property>
        <property name="text">
         <string>&amp;Edit...</string>
        </property>
@@ -118,6 +133,9 @@
      </item>
      <item>
       <widget class="QPushButton" name="deleteButton">
+       <property name="toolTip">
+        <string>Delete the currently selected address from the list</string>
+       </property>
        <property name="text">
         <string>&amp;Delete</string>
        </property>