fix: Ensures non-repeating selects have the right background color

- Adds all selects to the CSS rule defining the background color
- Updates custom ability repeating field to display Special Ability instead of Custom as per the title of the repeating fields

D&D_BECM/BDnDSheet.css

@@ -755,7 +755,8 @@ select {
 
 .repitem [type="number"],
 .repitem [type="text"],
-.repitem select {
+.repitem select,
+select {
 	background-color: var(--textarea-background);
 }
 

D&D_BECM/BDnDSheet.html

@@ -760,10 +760,10 @@
 						<input class="sheet-center" name="attr_customabilityname" placeholder="Name" type="text">
 					</div>
 					<div class="sheet-col-3-4">
-						<textarea class="sheet-center sheet-resizev sheet-small-textarea" name="attr_customabilitydescription" placeholder="Describe your custom ability here."></textarea>
+						<textarea class="sheet-center sheet-resizev sheet-small-textarea" name="attr_customabilitydescription" placeholder="Describe your ability here."></textarea>
 					</div>
 					<div class="sheet-col-1-16 sheet-center">
-						<button type="roll" class="sheet-roll" name="roll_displaycustomability" value="&{template:5eDefault} {{ability=1}} {{title=@{customabilityname}}} {{subheader=@{character_name} Custom Ability}} {{freetext=@{customabilitydescription}}}"></button>
+						<button type="roll" class="sheet-roll" name="roll_displaycustomability" value="&{template:5eDefault} {{ability=1}} {{title=@{customabilityname}}} {{subheader=@{character_name} Special Ability}} {{freetext=@{customabilitydescription}}}"></button>
 					</div>
 				</div>
 			</fieldset>