fix(aalborg_theme): standardize padding on input and a buttons

Follow-up of #6591
chore(vendors): Updated and minified jQuery Form

Upgraded jQuery Form to 3.50.

Fixes #6601
fix(upgrade): Added upgrade to deactivate TinyMCE and activate CKEditor.

Fixes #6653.
fix(comments): makes ElggComment E_STRICT compliant

Gives ElggComment::canComment the same signature as the method in
its parent class.
fix(rewrite_tester): more reliably sniffs active rewrite rules

Under certain conditions curl would fail to open localhost URLs where
file_get_contents would handle fine. This tries file_get_contents first
instead of curl.

Fixes #6656
Merge pull request #6658 from mrclay/canCommentStrict

fix(comments): makes ElggComment E_STRICT compliant
Merge pull request #6594 from PerJensen/aalborg_button_css

fix(aalborg_theme): standardize padding on input and a buttons and adds box-sizing
Merge pull request #6659 from mrclay/6656

fix(rewrite_tester): more reliably sniffs active rewrite rules
Merge pull request #6607 from sembrestels/vendors-jquery-form-min

chore(vendors): Updated and minified jQuery Form
fix(docs): fix a couple of typos
Merge pull request #6674 from beck24/docs-typos

fix(docs): fix a couple of typos
Merge pull request #6657 from brettp/tinymce_to_ck

fix(upgrade): Added upgrade to deactivate TinyMCE and activate CKEditor.
docs(about): Add contributing, history, releases, and values docs
Merge pull request #6687 from ewinslow/docs-about

docs(about): Add contributing, history, releases, and values docs