Distribution Wizard typos and some wording issue

Steps to reproduce

1. Create an older XWiki instance with a subwiki to be upgraded (e.g. 12.x or 13.x)
2. On this instance, replace the WAR with the one from a recent XWiki version (e.g. 17.4.4), to which the upgrade will be done
3. Start the instance and reach the Distribution Wizard
4. On "Step 2 - Flavor", observe the second sentence under the first heading "The currently installed flavor": "It often need to be upgraded to be in sync with the new distribution."
5. Click "Install this flavor" button
6. Observe the sentence just below "Flavor" section: "You are about to install the following flavor, please confirm or select an other flavor."
7. Follow the DW to reach "Step 5 - Report"
8. Observe the second sentence under "Pages" heading: "The following tree contains all the pages that have been created, modified or deleted page during the installation."

Expected results

Step 4: The second sentence should be: "It often needs to be upgraded to be in sync with the new distribution."

Step 6: The words "an" and "other" should be united: ""You are about to install the following flavor, please confirm or select another flavor."

Step 8: The sentence should be without the "page" word: "The following tree contains all the pages that have been created, modified or deleted during the installation."

Actual results

Step 4: There is an "s" missing on the work "needs". The same issue reproduces when a subwiki is upgraded (on "Step 1 - Flavor" this time).

Step 6: The words "an" and "other" are written separately.

Step 8: The word "page" (singular) is placed after enumeration of actions, which seems to be an oversight.