[ci skip] UX Guide Add general term section to copy

[ci skip] UX guide: clean up term tables in copy

[ci skip] UX guide: update dropdown max height for multiline items

doc/development/ux_guide/components.md

@@ -109,7 +109,7 @@ Dropdowns are used to allow users to choose one (or many) options from a list of
 
 ### Max size
 
-The max height for dropdowns should target **10-15 items**. If the height of the dropdown is too large, the list becomes very hard to parse and it is easy to visually lose track of the item you are looking for. Usability also suffers as more mouse movement is required, and you have a larger area in which you hijack the scroll away from the page level. While it may initially seem counterintuitive to not show as many items as you can, it is actually quicker and easier to process the information when it is cropped at a reasonable height.
+The max height for dropdowns should target **10-15** single line items, or **7-10** multi-line items. If the height of the dropdown is too large, the list becomes very hard to parse and it is easy to visually lose track of the item you are looking for. Usability also suffers as more mouse movement is required, and you have a larger area in which you hijack the scroll away from the page level. While it may initially seem counterintuitive to not show as many items as you can, it is actually quicker and easier to process the information when it is cropped at a reasonable height.
 
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doc/development/ux_guide/copy.md

@@ -102,6 +102,12 @@ When using the <kbd>Alt</kbd> keystrokes in Windows, use the numeric keypad, not
 ## Terminology
 Only use the terms in the tables below.
 
+### Projects and Groups
+
+| Term | Use | :no_entry_sign: Don't |
+| ---- | --- | ----- |
+| Members | When discussing the people who are a part of a project or a group. | Don't use `users`. |
+
 ### Issues
 
 #### Adjectives (states)
@@ -117,7 +123,7 @@ Use `5 open issues` and don’t use `5 pending issues`.
 
 #### Verbs (actions)
 
-| Term | Use | Don’t |
+| Term | Use | :no_entry_sign: Don’t |
 | ---- | --- | --- |
 | Add | Add an issue | Don’t use `create` or `new` |
 | View | View an open or closed issue ||
@@ -158,7 +164,7 @@ The form should be titled `Edit issue`. The submit button should be labeled `Sav
 
 #### Verbs (actions)
 
-| Term | Use | Don’t |
+| Term | Use | :no_entry_sign: Don’t |
 | ---- | --- | --- |
 | Add | Add a merge request | Do not use `create` or `new` |
 | View | View an open or merged merge request ||