Fix crash with MO rendering after loading QTAIM wfn.

Defensive programming to ensure mesh is actually loaded before
dereferencing. This isn't a full fix. Still need to find why
QTAIM is killing the existing meshes.

Change-Id: I1ccc8519498dfc1b6bcf3118ed56e0e854b5ef53
Merge topic 'FIX_qtaim-MO-crash' into master

3a837462 Fix crash with MO rendering after loading QTAIM wfn.
Fully fix PR#683. Don't fully clear the molecule when loading WFN.

All orbitals and other cubes were cleared on loading WFN. Instead
just remove atoms, bonds, etc. which will be reset with the WFN
analysis. Preserves orbital cubes, as expected by users.

Change-Id: I4df8af45d59a351f52ae0d308130950b4c9482c1
Bump version number for v1.1.1 bug fix release.

Change-Id: Ic6ac6e29ff861bb4b178c23d40a5e607c18cd1e8
Automated update of translation templates (POT) using latest strings.

Change-Id: Iec7ff4cd3c3254af406730ff49ce60e7b9c36e03
Merge topic 'FIX_qtaim-MO-clearing' into master

e3c574c7 Fully fix PR#683. Don't fully clear the molecule when loading WFN.
Merge topic 'bump-to-version-number' into master

6336a8f5 Bump version number for v1.1.1 bug fix release.