Fix T59626: Outliner rename overlaps icons

Fix for T59219 was using low alpha-light grey for text background
so editing text would always be slightly brighter then the existing
background.

This causes outliner rename to have low alpha making text overlap
icons.

Use solid color to avoid issues with overlapping UI
elements in the future.

release/datafiles/userdef/userdef_default_theme.c

@@ -51,7 +51,7 @@ const bTheme U_theme_default = {
 		.wcol_text = {
 			.outline = RGBA(0x444444ff),
 			.inner = RGBA(0x1f1f1fff),
-			.inner_sel = RGBA(0xb3b3b333),
+			.inner_sel = RGBA(0x505050ff),
 			.item = RGBA(0x191919ff),
 			.text = RGBA(0xe6e6e6ff),
 			.text_sel = RGBA(0xffffffff),
@@ -92,7 +92,7 @@ const bTheme U_theme_default = {
 		.wcol_num = {
 			.outline = RGBA(0x444444ff),
 			.inner = RGBA(0x595959ff),
-			.inner_sel = RGBA(0xb3b3b333),
+			.inner_sel = RGBA(0x505050ff),
 			.item = RGBA(0x191919ff),
 			.text = RGBA(0xe6e6e6ff),
 			.text_sel = RGBA(0xffffffff),
@@ -101,7 +101,7 @@ const bTheme U_theme_default = {
 		.wcol_numslider = {
 			.outline = RGBA(0x444444ff),
 			.inner = RGBA(0x595959ff),
-			.inner_sel = RGBA(0xb3b3b333),
+			.inner_sel = RGBA(0x505050ff),
 			.item = RGBA(0x5680c2e6),
 			.text = RGBA(0xe6e6e6ff),
 			.text_sel = RGBA(0xffffffff),