Some small bugs fixing and improvements include --

• Clicking on canvas region should fold any unfolded panel.
• Fix active tool image display on tool changing.
• Empty text submission from the Text tool should switch to last active tool.
• Highlighting of active brush for some brushes isn't working...these brushes need to be renamed as handled in Activity.selectMode().
• Fix dimension of the currently active tool, color, undo and redo box.
• Disable undo/redo button when undo/redo stack are empty.
• Bug : inside the MouseArea for typing the text of the text tool, it is impossible to start drawing a line. Looks like a conflict somewhere.
• Problem: clicking undo after using the eraser just clears the page. We should keep undo stack when changing tools.
• Color: selected color to paint should be the one shown in the color selector after moving some sliders, without being forced to save the color in a slot.
• Eraser actually removes the redo stack (pencil, draw one line, take eraser, erase some part of the line. Ctrl+Z removes all the drawing, Ctrl+Y logs: "redo stack empty")
• Clicking on the bar with "undo/redo/actual color" should not draw behind it (and count into the undo/redo stack)
• The color of the text preview is not the current one but the last previous one used (and it changes to the current one when we click on Bold/Italic).
• What should we do after validating the text and placing it? Should we keep the text tool and have again the text input window?
• on Flood fill tool, I have this warning: "qml: ON Pressed - tool not known". Sometimes, it does not change the color of the background. It seems it does not finish, I have the log for the start but not the completion... (after using Erase tool)
• When I use a stamp, it removes all different already used stamps from the canvas.

More to be added based on reviews and testing.....