This assigns the "Tab" key to a general pcbnew 45° limitation. Limit
can be enabled/disabled using context menu as well.
Removed the user preference for 45° limitation on graphic lines as that
is overlapping with the general limitation, which is not an editing
preference so much as a temporary adjustment to tool action.
Related to https://gitlab.com/kicad/code/kicad/-/issues/8490
It is still possible to move a pad independent of footprint through
the pad properties dialog. This is a much more conscious decision
than using the move tools.
ADDED: "Allow free pads" preference setting in pcbnew, default to off.
When enabled, allows moving unlocked pads independent of the footprint
(i.e. previous behaviour). When disabled (default), any attempt to move
a pad will move the parent footprint instead.
REMOVED: "Lock pads of newly added footprints" preference setting in
pcbnew. (Pad lock state is now loaded from the footprint definition)
CHANGED: There are now only two possible lock states for a footprint:
locked and unlocked. The lock state of the pads in the footprint is
now independent of the footprint lock state.
Also fixed a latent bug that would allow a pad to be moved when the
parent footprint was locked (see m_selectionTool->RequestSelection
lambdas in edit_tool.cpp)
Fixes https://gitlab.com/kicad/code/kicad/-/issues/7739