TinyMCE: remove reposition delay on showing the image toolbar. Not needed when no animation. Fixes #30670.

git-svn-id: https://develop.svn.wordpress.org/trunk@30829 602fd350-edb4-49c9-b593-d223f7449a82
Fix search box position on the Add Plugins screen after resizing the window to narrower than 1000px and then back to wider than 1200px. Fixes #30658.

git-svn-id: https://develop.svn.wordpress.org/trunk@30830 602fd350-edb4-49c9-b593-d223f7449a82