This is a combination of 4 commits.

Rework FormulaTokenArray ScRecalcMode in preparation for tdf#94925

Strictly order the exclusive bits by priority, let AddRecalcMode()
handle all sets except forced ALWAYS or NORMAL.

Introduce ONLOAD_LENIENT and ONLOAD_MUST splitting ONLOAD to be
able to distinguish later during OOXML import.

Reviewed-on: https://gerrit.libreoffice.org/57402Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins

Resolves: tdf#94925 do not unset dirty if formula cell must be recalculated

Reviewed-on: https://gerrit.libreoffice.org/57404Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins

Broadcast formula cells marked for recalc, tdf#94925 related

In fact the ScDocument::CalcFormulaTree() call in
WorkbookFragment::recalcFormulaCells() never did anything because
no formula cell was added to the tree. Only visible dirty cells
were recalculated, but not their dependents.

Reviewed-on: https://gerrit.libreoffice.org/57431Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Jenkins

Remove the check for IsRecalcModeMustAfterImport(), tdf#94925 follow-up

It's now superfluous as we set those cells dirty and broadcast in
ScDocumentImport::broadcastRecalcAfterImport()

Reviewed-on: https://gerrit.libreoffice.org/57439Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>

f70860b8babf1cce7fda2ae63412659e72dbb4c3
a9dd4ad16c20b23ee8a1d46b69a4702b1ad4c81f
188de2d53a2d54df32d24eeeb148c4f9e87e7cfc

Change-Id: I11217fa19adb766f509d0d6854502112de547c59
Reviewed-on: https://gerrit.libreoffice.org/57438
Tested-by: Jenkins
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>