Bump version to 4.5.3

Release 4.5.2

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Use an install-type marker to detect fresh installs reliably

The previous fix compared live options at activation time, but by then
EmbedpressSettings::__construct has already written default settings, so
every site looks "non-empty" — including fresh installs. That meant no
one was ever redirected to the setup wizard.

Set an 'embedpress_install_type' marker at the top of the constructor,
before any default writes. If 'embedpress_elements_updated' or any
saved settings/elements exist, this is an existing user — mark it
'existing'. Otherwise mark it 'fresh'. The activation callback reads
this marker to decide whether to trigger the redirect.

Also clear any stuck need_first_time_redirect flag for existing users
so they aren't dropped into the wizard after updating from a version
with the earlier buggy migration.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Update embedpress.pot

feat: Add "Always Show Controls" option to Wistia settings and update…

… plugin version to 4.4.11.

Merge branch 'latest'

Update readme.txt

Update embedpress.pot

updated org icons

Update readme.txt