Cell/Worksheet metadata
* metadata dicts are attached to cells and worksheets
* restores collapsed flag to the nbformat - this change happened in the refactor, and was undocumented, and possibly accidental. But we should either document it or fix it, and this includes a fix.
* adds a new field, `nbformat_minor`, used to denote minor bumps of the notebook format that expose new capabilities but don't prevent loading by older clients.
* Add a warning in Javascript if loading a multiworksheet notebook (which will exist in the future) as current JS code will only save the first.
closes#1915
fix for #1678, undo no longer clears cells
With these changes, Ctrl-Z inside of codemirror cells will only undo up to the text that was in the cell when it was loaded from JSON.
closes#1678
I found another bug where switching the cell type causes the loss of all
undo history for that cell. With this commit, switching the cell type
simply resets the history
Fix 1px margin bouncing of selected menu item.
This fixes the margin of the active menu item to zero, so now the text doesn't shift around, even if you use larger fonts.
To reproduce the original error, zoom your notebook (ctrl-mousewheel, or ctrl-+ in most browsers) and try the menu.
Fix vertical offset due to bold/italics, and bad browser fonts.
Adds a dialog warning users when a problematic monospaced font is detected, so they can change their configuration.
Make : invalid in filenames in the Notebook JS code.
This only prevents : in the filenames on the JavaScript side of things. Handling this on the server side will be a separate issue that is related to other open issue. I will update those to reflect this.
closes#1781
When kernel is died and restarted, or restarted while it is in the
busy state, message "(Busy)" on the window title is not updated. This
problem is fixed by updating document title when restarting.