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Added facility to preferences dialog box to notify caller if any changes were made that require main window UI to be re-displayed.
All preferences frames were modified to flag such changes.
Modified TDialogMgr manager to pass this extra info to main form.
Modified main form to refresh display if required.

Standardised svn:mime-type properties to "text/plain" and svn:eol-style to "native"

Reintegrated v4-dev branch into trunk.
Trunk now contains v4 development tree

* Added a new group box where user can specify required start-up state of overview treeview.
* Revised code that arranges controls.

Merged changes from /branches/os-fonts:22-106 branch.

These changes add support for default operating system fonts to main display and dialog boxes.

Imported CodeSnip v3.0