The disable grid hotkey should allow the snap scale to be completely
determined by the snapSize and world scale. This prevents snapRange
from overriding in the case where grid is disabled.
Additionally, we disallow grid snapping when the grid scale is not
visible. This means that when zoomed out sufficiently to not show the
minor ticks, these minor ticks will not override a snap
Fixes https://gitlab.com/kicad/code/kicad/issues/12303
The automatic wire tool was not working in the gridless mode because the
grid snapping on/off logic present in `EE_GRID_HELPER`, based on the
value of `m_enableGrid`, was not taking into account that another check,
but for the global KiCad setting, would be performed in the `Align()`
method, which is inherited from `GRID_HELPER`.
I've modified all tests of `m_enableGrid` value to also take the global
setting into account, and moved checks for it to `Align()` method, as
it's more consistent this way.
I've also removed an override of the `Align()` method in the
`PCB_GRID_HELPER` class, as it was made redundant by my changes.
Fixes https://gitlab.com/kicad/code/kicad/issues/7402
Mike Williams
Seth Hillbrand
Wayne Stambaugh
Mikolaj Wielgus
Jeff Young