Now shows the tooltip underneath the mouse cursor.
Whitespace
Changed Data selector on Graph: can now toggle with mouse and with keyboard.

Previously, the data toggle was hooked to the mouse-click handler. Now I hooked it to the itemChanged() handler, which gets invoked by pressing space.
Fix for a runtime warning during startup.

The bug fix for boundingRect() will only be applied, if the font size is actually given as pointSizeF(), and not pixelSize().
Added space in error message.

Otherwise, the app name and the word "already" are stuck together.
Whitespace
Added SearchFilter for Standard and Advanced Parameters.

Type in any search expression and it will be searched in the parameter name, the title or the description or the values of the combo box (if applicable). Separate individual search terms with spaces.