fix celltoolbar layout on FF
fix button css
remove one useless element
get monospace pager back
Don't assume test case for %time will finish in 0 time.

Closes gh-2899
Merge pull request #2900 from takluyver/i2899

Don't assume test case for %time will finish in 0 time

Closes gh-2899
catch AttributeError in cleanup_connection_files

can be triggered during garbage collection (os.remove is destroyed before the KM instance)
fix a few remaining KernelApp/IPKernelApp changes
skip remaining ipc test on Windows

ipc is not a valid transport on Windows.
Merge pull request #2905 from minrk/kernel_parent_config

fix a few remaining KernelApp/IPKernelApp changes
fix last remaining KernelApp reference
Merge pull request #2908 from minrk/onemoreip

fix last remaining KernelApp reference
Merge pull request #2904 from minrk/winipc

Skip remaining IPC test on Windows

also fix an issue that could appear as an AttributeError when KM.__del__ is called during gc on process exit.

closes #2898
Merge pull request #2876 from Carreau/fixctff

fix celltoolbar layout on FF

Ok, bug was due to an extra empty div... This seem to lok ok on both FF and Chrome OS X.

Think of adding 
$.getScript('/static/js/celltoolbarpresets/example.js')

to your custom.js to fully test.
Merge pull request #2885 from Carreau/monospace-pager

get monospace pager back
Use inputhook_wx2 on osx

Fixes #2762