Update TinyMCE to 3.5.x

[azaozz]

The new 3.5 branch of TinyMCE has many improvements: all HTML5 tags are supported, several new commands and API methods, it's faster, fixes many bugs, etc. Full changelog: ​https://github.com/tinymce/tinymce/blob/master/changelog.txt

[azaozz]

In [21228]:

Update TinyMCE to 3.5.4.1, fixes #21173

[azaozz]

This also includes ​the fix for #21025, backported.

[azaozz]

This brought up some incompatibilities with our custom TinyMCE plugins.

[azaozz]

In [21254]:

TinyMCE: when pressing Enter while an image with caption is selected, fix moving the caret in a new paragraph under it, fix opening the Image Properties popup in IE9, see #21173

[azaozz]

In [21545]:

Update TinyMCE to 3.5.6, see #21173

[azaozz]

In [21576]:

Disable the (fake) image resizing in WebKit and Opera in TinyMCE 3.5.6, fix dragging image with caption in Firefox, see #21173

[azaozz]

In [21586]:

Fix tabbing from the title to the editor on the Edit Post screen, see #21173

[azaozz]

Update to TinyMCE 3.5.7, it contains couple of fixes that we have backported in 3.5.6. I know we are in beta but this update is stable and doesn't seem to include any code that could break any of our custom plugins.

[azaozz]

In 22550:

TinuMCE: update to 3.5.7, fixes #21173