Disable search box autofocus on issue/pr pages (#12229)

Various pages like the issue list autofocus their search box which I find rather intrusive because more often than not I don't want to type into the search box, it's distracting if the focus jumps after page load. Disable this behaviour.

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

templates/repo/issue/search.tmpl

@@ -5,7 +5,7 @@
 		<input type="hidden" name="labels" value="{{.SelectLabels}}"/>
 		<input type="hidden" name="milestone" value="{{$.MilestoneID}}"/>
 		<input type="hidden" name="assignee" value="{{$.AssigneeID}}"/>
-		<input name="q" value="{{.Keyword}}" placeholder="{{.i18n.Tr "explore.search"}}..." autofocus>
+		<input name="q" value="{{.Keyword}}" placeholder="{{.i18n.Tr "explore.search"}}...">
 		<button class="ui blue button" type="submit">{{.i18n.Tr "explore.search"}}</button>
 	</div>
 </form>

templates/user/dashboard/issues.tmpl

@@ -72,7 +72,7 @@
 								<input type="hidden" name="repos" value="[{{range $.RepoIDs}}{{.}}%2C{{end}}]"/>
 								<input type="hidden" name="sort" value="{{$.SortType}}"/>
 								<input type="hidden" name="state" value="{{$.State}}"/>
-								<input name="q" value="{{$.Keyword}}" placeholder="{{.i18n.Tr "explore.search"}}..." autofocus>
+								<input name="q" value="{{$.Keyword}}" placeholder="{{.i18n.Tr "explore.search"}}...">
 								<button class="ui blue button" type="submit">{{.i18n.Tr "explore.search"}}</button>
 							</div>
 						</form>