streamlined @pd_extra parsing for easier integration with other file open calls including externals. Added it to open_via_path

added pdtk_canvas_force_getscroll function to ensure critical getscroll events are executed immediately

optimizations to the scrolling algorithm including erroneous jumps in the scrollbar when pasting/cutting/duplicating things.

streamlined selection logic and added ability for pd to recognize system-wide @pd_extra variable within the path

fixed double loadbang regression due to implementation of internal pre-loadbang mechanism for the preset engine.

fixed segfault when closing array window/subpatch due to lack of checking of valid resize/move hook pointers

improved nlet highlighting (integrated it into glist), fixed bug with multiselect with mixed objects (accelerated and legacy)

provided a more robust way of suspending dsp before closing the patch... needs testing to see if this fixes lingering sporadic crashes when quitting without closing the patch.

implemented universal catch{} for all commands sent from c to tcl to minimize (eradicate?) stderr output.

*fixed bug where objects were selected via a mouse click based on their left-to-right rather than top-to-bottom position
*fixed bug where undoing moving of a GOP object would incorrectly draw the object on top of other objects
*fixed bug where nlets would show on top of other objects when highlighted

fixed wrong color fill for selected gop object when opening gop-ed subpatch, incorrect selection of all scalars inside gop-ed patch when it is being edited as a toplevel window, and a bug where repeatedly opening already open gop-ed patch does not re-focus its toplevel window

code clean-up, more font resize/zoom fixes (hopefully done with it), and a minor bug fix for select all inside font window

fixed automatic resizing of the gop when changing font sizes, complete overhaul of the tooltip engine. TODO: add proper nlet tags to iemgui objects...

made gop resize and move hooks visible only when nothing else is selected on that canvas to minimize possible overlap of selection hooks

fixed bug where gop element with hidden text still did not allow resizing below the width of the text

fixed confirming saving changes on an abstraction hidden inside another patch (currently invisible) whose prompting failed...

finished undo implementation, added consistency to how canvas properties window is handled in undo situations, removed debug output.

removed rendundant memory hack and found potentially real and permanent fix to the double-entry bug (see g_canvas.c inside canvas_free() function). Many thanks to Krzysztof Czaja for his incredibly helpful hint!

added redundant memory remapping when creating new embedded canvases to avoid double-entry bug which has resurfaced since the introduction of the infinite undo.

Fixed nasty bug where doubly-embedded pd canvases (not abstractions) did not redraw properly (affects all known versions of pd) plus additional clean-up and improvements on the gop redrawing/apply logic including ability to limit minimum size on gop-enabled objects without parents that also do not have hidetext enabled.

Further refined auto-resizing logic and improved redrawing of the gop rectangle to account for object text size

added gop move/resize via gui, improved logic on autoresizing objects to accomodate space for nlets (GOP-ed objects with hidden text can be of just abuot any size)

Cleaning up code plus attempts at improving script-based dynamic closing/opening of patches (as per Jonathan's request).

*fixed graph-on-parent enable/disable does not activate undo/redo on the parent window (or the gop-ed patch unless it is open)
*improved verifyquit mechanism to accomodate abstractions
*fixed bug where hide text value was not properly interpreted by the canvas apply redo/undo
*fixed stray stderr tcl/tk errors

Cleaned-up paste from external text into canvas feature, enabled the said paste action, and added ability to relocate and resize canvas as part of pasting into an empty canvas. If pasting into a canvas already populated with at least one object, the paste of the said information ignores canvas properties and pastes objects at mouse