Added new function CDocument.CanEdit() to check whether we can edit the document or not. This check was added to a function that checks for locks, so there is no need to set GlobalLock in FillingForm mode and AddCommentsInView mode.

Stop travis build if any line ended with failure

Add `.unit-tests/FormulaTests.html` run to build process

Hotfix/v4.3.5

add column 1 chart fix error: Uncaught TypeError: Cannot read property 'length' of null (if selected 1 empty cell)

do not create table's styles for charts

Fixed bug with moving cursor through a table cells via tab button in case  when table is a part of the block-level content control. Fixed problem with drawing the bounding path around the inline-level content control in a table cell.

Fixed bug with drawing the bounding path around an inline content control in the header/footer. Fixed bug with not laying paragraph end mark inside bounds of the block level content control.