Rename "Load [file]" to "Open [file]"
Set default file save as path to the previous path
Move document modification noting into read/write
Incorporate export HTML into save as
Connect toolbar signals only once

Replace endless connecting and disconnecting with slots that receive
toolbar signals and then call the function of the editor.
Change action slots in EditorView to functions

Change action slots in EditorView to ordinary functions, because they
are used so.
Show full path when asking about saving a file
Stop MDEdit::closeEvent checks on first cancel
Recycle dialog in MDEdit::closeEvent
Create a class for safe file questions

Create a class SaveFileQuestionDialog that creates a dialog to ask
whether the user wants to save a modified file.