Information in the progress window (example: rescan) is displayed capped to fixed size instead of contents.

<img width="209" alt="screenshot 2018-12-21 at 14 58 20" src="https://user-images.githubusercontent.com/26601261/50345943-0bbd4300-0531-11e9-9c6c-e277ac69eb0c.png">

#include <qt/walletview.h>
#include <qt/addressbookpage.h>
#include <qt/askpassphrasedialog.h>
#include <qt/bitcoingui.h>
#include <qt/clientmodel.h>
#include <qt/guiutil.h>
#include <qt/optionsmodel.h>
#include <qt/overviewpage.h>
#include <qt/platformstyle.h>
#include <qt/receivecoinsdialog.h>
#include <qt/sendcoinsdialog.h>
#include <qt/signverifymessagedialog.h>
#include <qt/transactiontablemodel.h>
#include <qt/transactionview.h>
#include <qt/walletmodel.h>
#include <interfaces/node.h>
#include <ui_interface.h>
#include <QAction>
#include <QActionGroup>
#include <QFileDialog>
#include <QHBoxLayout>
#include <QProgressDialog>
#include <QPushButton>
#include <QVBoxLayout>
WalletView::WalletView(const PlatformStyle *_platformStyle, QWidget *parent):