Replace hardcoded English UI strings with localizable keys

For http://www.google-melange.com/gci/task/view/google/gci2014/5772743572193280
Some languages are "right to left" and mixing the variables with localization text is not as simple as here. Instead I suggest to create a new key in Localization/en.xml and put there something like:

```
<string name="report-writing">Writing $1</string>
// then replace the cpp code with
this->qEdit->Target = _l("report-writing", this->Page->PageName);
```