luci-base: correctness fixes

luci-base: correctness fixes

validation:

use correct argument position for apply

network:

spec.need_tag -> port.need_tag agrees with old lua compat

widgets:

rv.length is undefined, use firstChild

form:

Follow-up to 315dbfc7498e2f43afb0119b992915e8f311bc37
checkDepends recursion fix and implement cache lookup

uci:

improve timeout and Promise handling

ui:

follow-up to 92381c3ca285c2303a59c74509fb4d6a422fece3
renderListing sort: put directories first
getActiveTabId: check isNaN for tab state
getScrollParent: fix evaluation logic
fadeOutNotification: implement immediate timeout
openDropdown: accelerate draw via getBoundingClientRect

form:
ensure FlagValue parse always resolves

fs:
parse all 'expect' keys in RpcReply

luci:

Use the same source of truth in both the check and the dispatch
for flushRequestQueue

string check for dom string additions

Signed-off-by: Paul Donald <redacted>