[css-align] Linking tweaks, moved an issue, added an issue about semi-unsafe overflow.

Author: tabatkins

css-align/Overview.bs

@@ -333,7 +333,7 @@ Distributed Alignment: the ''<content-distribution>/stretch'', ''space-between''
 
 	<pre class='prod'> <dfn>&lt;content-distribution></dfn> = space-between | space-around | space-evenly | stretch</pre>
 
-	<dl dfn-type="value" dfn-for="<content-distribution>">
+	<dl dfn-type="value" dfn-for="align-content, justify-content, <content-distribution>">
 		<dt><dfn>space-between</dfn>
 		<dd>
 			The <a>alignment subjects</a> are evenly distributed in the <a>alignment container</a>.
@@ -366,16 +366,14 @@ Distributed Alignment: the ''<content-distribution>/stretch'', ''space-between''
 		<dt><dfn>stretch</dfn>
 		<dd>
 			If the combined size of the <a>alignment subjects</a> is less than the size of the <a>alignment container</a>,
-			any ''width/auto''-sized <a>alignment subjects</a> have their size increased equally (not proportionally),
-			while still respecting the constraints imposed by 'max-height'/'max-width',
+			any <css>auto</css>-sized <a>alignment subjects</a> have their size increased equally (not proportionally),
+			while still respecting the constraints imposed by 'max-height'/'max-width'
+			(or equivalent functionality),
 			so that the combined size exactly fills the <a>alignment container</a>.
 
 			Unless otherwise specified,
 			this value falls back to ''flex-start''.
 			<span class='note'>(For layout modes other than flex layout, ''flex-start'' is identical to ''start''.)</span>
-
-			Issue: Should this value allow a fallback alignment on 'align-self' and 'justify-self',
-			like it does on 'align-content' and 'justify-content'?
 	</dl>
 
 	<p class='issue'>
@@ -414,6 +412,11 @@ Overflow Alignment: the ''safe'' and ''unsafe'' keywords</h3>
 			the given alignment value is honored.
 	</dl>
 
+	Issue: Should we add a third (default) value that overflows up until the point that it would overflow into an unscrollable region?
+	This is probably what's actually needed;
+	we can't default to "safe" because of Flexbox,
+	but this slight tweak to "unsafe" is probably safe compat-wise,
+	and would help users on small screens.
 
 	<div class='example'>
 		The figure below illustrates the difference in "safe" versus "unsafe" centering,
@@ -694,6 +697,9 @@ Inline/Main-Axis Alignment: the 'justify-self' property</h3>
 	while still respecting the constraints imposed by 'min-height'/'min-width'/'max-height'/'max-width'.
 	Unless otherwise specified, this value falls back to ''flex-start''.
 
+	Issue: Should ''justify-self/stretch'' allow a fallback alignment,
+	like it does on 'align-content' and 'justify-content'?
+
 	Note: The ''justify-self/stretch'' keyword can cause elements to shrink,
 	to fit their container.