Fix undefined TRUE/FALSE in postgresql driver, don't use or define TRUE/FALSE constants if not needed, and fix some english mistakes.
[INTERPRETER]
* BUG: Fix some english mistakes in comments of various files.
[GB.DB.POSTGRESQL]
* BUG: Fix undefined TRUE/FALSE
[GB.DB.SQLITE2]
* NEW: Do not define TRUE/FALSE constants.
[GB.GTK]
* NEW: Do not use TRUE/FALSE constants in 'font-parser.cpp'.
[GB.GTK3]
* NEW: Do not use TRUE/FALSE constants in 'font-parser.cpp'.
[GB.JIT]
* NEW: Remove the definition of TRUE/FALSE constants in generated code. That prevents the generated code from compiling, so it will be undone in a next commit.
[GB.SIGNAL]
* BUG: Fix an english mistake in an error message.
See merge request gambas/gambas!45
[INTERPRETER]
* NEW: Overriding public variables was useless, and is now forbidden to help JIT compiler optimizations.
[GB.JIT]
* BUG: Correctly compile dynamic accesses to public constants.
[GB.QT4]
* NEW: Mouse.State has now flags for keyboard modifiers too.
* BUG: MouseWheel events on disabled controls are correctly propagated now.
[GB.QT5]
* NEW: Mouse.State has now flags for keyboard modifiers too.
* BUG: MouseWheel events on disabled controls are correctly propagated now.
[GB.FORM]
* OPT: FileView: Optimize view refresh.
* BUG: SidePanel: Side buttons were sometimes created twice.
* BUG: SidePanel: Side buttons tooltips are now always correct.
[GB.GUI.BASE]
* BUG: IconView: Items highglight is correctly drawn now.
* OPT: TreeView: Allows the view to be locked while a lot of items are added.
* NEW: TreeView: BeforeSort is a new event that allows a caller to prepare its custom view sort.
[DEVELOPMENT ENVIRONMENT]
* NEW: Update French translation.
* BUG: Image editor: The property sheet is now disabled when the editor is read-only.
* BUG: Image editor: Remove a debugging message.
[GB.FORM]
* BUG: ColorPalette: Handle mouse wheel events correctly.
* BUG: ColorPalette: Ensure that the current color is visible.
* NEW: ColorChooser: The value slider now handles mouse wheel events.
* OPT: FileView: Sort the files once when the view is reloaded.
* NEW: TableView: Move the editor so that the cell border is correctly visible.
[GB.GUI.BASE]
* NEW: GridView: Draw last column and last rows separators even if Grid is not set when the GridView is actually a TableView.
* BUG: ScrollView: Fix arrangement.
* OPT: TreeView: Define the default row size, so that adding items is faster.
[GB.GTK]
* NEW: Remove PictureBox control.
[GB.GTK3]
* NEW: Remove PictureBox control.
[GB.GUI.BASE]
* NEW: PictureBox is now implemented in Gambas.
* NEW: PictureBox: Image is a new property that allows to display an Image instead of a Picture.
* NEW: PictureBox: Mode is a new property that defines how the image fills the control.
[GB.QT4]
* NEW: Remove PictureBox control.
[GB.QT5]
* NEW: Remove PictureBox control.
[GB.FORM.MDI]
* NEW: Action.Add() is a new method that allows to declare a new action.
* NEW: Action.AddFrom() is a new method that declare a new action from a control.
[GB.GUI.BASE]
* NEW: Action.Keys is new static property that returns the list of all action keys.
* NEW: Action[].HasShortcut is a new property that returs if an action can have a shortcut.
