allow translation of "options" used in the --help message / split translation of RPC console welcome message and remove the need to take care of "<br>" / remove some spaces in strings and misc other stuff related to translations

src/qt/bitcoin.cpp

@@ -149,7 +149,7 @@ HelpMessageBox::HelpMessageBox(QWidget *parent):
     header = tr("Bitcoin-Qt") + " " + tr("version") + " " +
         QString::fromStdString(FormatFullVersion()) + "\n\n" +
         tr("Usage:") + "\n" +
-          "  bitcoin-qt [options]                     " + "\n";
+        "  bitcoin-qt [" + tr("options") + "]                     " + "\n";
     coreOptions = QString::fromStdString(HelpMessage());
     uiOptions = tr("UI options") + ":\n" +
         "  -lang=<lang>           " + tr("Set language, for example \"de_DE\" (default: system locale)") + "\n" +

src/qt/forms/messagepage.ui

@@ -11,7 +11,7 @@
    </rect>
   </property>
   <property name="windowTitle">
-   <string>Sign Message Dialog</string>
+   <string>Sign Message</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>

src/qt/rpcconsole.cpp

@@ -207,9 +207,9 @@ void RPCConsole::clear()
                 "b { color: #006060; } "
                 );
 
-    message(CMD_REPLY, tr("Welcome to the Bitcoin RPC console.<br>"
-                          "Use up and down arrows to navigate history, and <b>Ctrl-L</b> to clear screen.<br>"
-                          "Type <b>help</b> for an overview of available commands."), true);
+    message(CMD_REPLY, (tr("Welcome to the Bitcoin RPC console.") + "<br>" +
+                        tr("Use up and down arrows to navigate history, and <b>Ctrl-L</b> to clear screen.") + "<br>" +
+                        tr("Type <b>help</b> for an overview of available commands.")), true);
 }
 
 void RPCConsole::message(int category, const QString &message, bool html)

src/qt/verifymessagedialog.cpp

@@ -25,7 +25,7 @@ VerifyMessageDialog::VerifyMessageDialog(AddressTableModel *addressModel, QWidge
 #if (QT_VERSION >= 0x040700)
     /* Do not move this to the XML file, Qt before 4.7 will choke on it */
     ui->lnSig->setPlaceholderText(tr("Enter Bitcoin signature"));
-    ui->lnAddress->setPlaceholderText(tr("Click \"Apply\" to obtain address"));
+    ui->lnAddress->setPlaceholderText(tr("Click \"Verify Message\" to obtain address"));
 #endif
 
     GUIUtil::setupAddressWidget(ui->lnAddress, this);