[TASK] Forms: Input/textarea :focus style

Brings a discreet :focus style for fields and buttons in ice
blue to complement our favorite TYPO3 orange.

Is introduced for all input fields, input submit & input reset,
buttons and textareas - generally and without exceptions.

Select and multi select fields do not get this focus definition.

Resolves: #55901
Releases: 6.2
Change-Id: I49d958199e29560a766f4687aa76541d07702901
Reviewed-on: https://review.typo3.org/27562
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind

typo3/sysext/t3skin/Resources/Public/Css/visual/main_form.css

 /* - - - - - - - - - - - - - - - - - - - - -
 Form
 - - - - - - - - - - - - - - - - - - - - - */
+
 input,
 textarea,
 button {
@@ -9,12 +10,16 @@ button {
 	border-radius: 2px;
 }
 
-textarea.fixed-font {
-	font-family: "Lucida Console", "Lucida Sans Typewriter", "Bitstream Vera Sans Mono", monospace;
+input:focus,
+textarea:focus,
+button:focus {
+	border-color: rgb(50, 160, 255);
+	box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.075), 0 0 6px rgba(50, 160, 255, 0.6);
+	outline: 0;
 }
 
-textarea:hover {
-	border: 1px solid #737f91;
+textarea.fixed-font {
+	font-family: "Lucida Console", "Lucida Sans Typewriter", "Bitstream Vera Sans Mono", monospace;
 }
 
 .checkbox,