Update release notes

Change-Id: Iada521e83ddd03dbfab4cba276b313daf27a1173
Fixed native button not triggering click event in IE #11094

Change-Id: I210a7ab59b107eefb9ba5d00566c2138fc83acf2
Fixed date reset when calendar is first initialized #11387

Change-Id: I48a839cceeab3cfc6722657eac8681a8766ab396
Fixes #11152 (IE9 caret/cursor postion) by applying position:relative to inputs and textareas

Change-Id: I067cd44d21ece65a0988b2fbb832a903aaf92aba
Merge release notes from '7.0.4' into 7.0

7.0.4

Change-Id: If47b657f0f941af11b02d0915e689f0568730077
Fixed IE8 scrollbar issue with vertical layout when using both expansions and alignments #11169

Change-Id: Ia62db30e4e7f9bd02966db31b3bb691a1a60e58d
Don't detach and reattach VAbstractSplitPanel child widgets unnecessarily (#11628)

Change-Id: I84da9b786706410b42ae4116be0b0a3da896538b
Support "to" in CSS function parameters (#11309)

This change also relaxes whitespace checking in SCSS tests slightly.

Change-Id: I2ad5087e7d77ddd0473df47d202c6dd3e228181f
Prevent double encoding problems when URI fragment contains special characters (#10769)

Change-Id: I9043a1f84140b441ab4b3e86eadb708359a29155
Fixed Accordion tab stylenames which never got applied on the tab widgets #11645 (merged from #10605 in 6.8 branch)

Change-Id: I6af93e3846ecedd31cb9afac6321316b122c9df5
Different fix for #11152 which is restricted to the problematic case in horizontal layout

Change-Id: I4727f0a8f0b82f14f059c7e47a1819a18630a4c0
Merge commit 'feb9a8c3510afc76c079fafcd9e507205bde139c'

Conflicts:
	WebContent/release-notes.html
	theme-compiler/src/com/vaadin/sass/internal/parser/Parser.java

Change-Id: Iad9ee95b2f399ff93f0e426a0810b18d923f8ff6