- (experimental) implemented rewriters (models that are responsible for defining rewriting classes) : eval() should not be a requirement anymore
- implemented a messages system dedicated to the extension (rough version)
- added customization parameters at global-level : possibility to ignore custom widths/alignments/headers for grid columns, pinnable actions block (including pager, export, mass-actions, search buttons), custom pagination values (grid-level expected in a next version)
- refactored system configuration (different sections in a dedicated tab, more should follow)
- some small fixes