Themes: .btn padding + small adjustments (#7168)

Closes https://github.com/FreshRSS/FreshRSS/issues/6262

Changes proposed in this pull request:

- CSS: the search button was too big/not flexible enough for the height because of the padding


How to test the feature manually:

1. browser configuration: change the default font size from (`16`pt mostly) to `15` or `14`
2. go to subscription management -> `Subscription tools`
3. there should be no scroll bar (because the left hand side navigation is short and the content right hand side is short too)

Side effect: All buttons will be a bit smaller as before (because `px` -> `rem`) It should not be an issue at all

2 files changed, 4 insertions, 4 deletions

diff --git a/p/themes/Flat/flat.css b/p/themes/Flat/flat.css
index 2241f5156..da055dff8 100644
--- a/p/themes/Flat/flat.css
+++ b/p/themes/Flat/flat.css
@@ -47,7 +47,7 @@ input, select, textarea {
 	border-left-color: #ddd;
 	border-radius: 5px;
 	min-height: 25px;
-	line-height: 25px;
+	line-height: 1;
 	vertical-align: middle;
 }
 
@@ -174,7 +174,7 @@ th {
 
 .btn {
 	margin: 0;
-	padding: 5px 10px;
+	padding: 0.25rem 0.5rem;
 	background: #3498db;
 	color: #fff;
 	font-size: 0.9rem;
diff --git a/p/themes/Flat/flat.rtl.css b/p/themes/Flat/flat.rtl.css
index d824c4e4a..b911f8f56 100644
--- a/p/themes/Flat/flat.rtl.css
+++ b/p/themes/Flat/flat.rtl.css
@@ -47,7 +47,7 @@ input, select, textarea {
 	border-right-color: #ddd;
 	border-radius: 5px;
 	min-height: 25px;
-	line-height: 25px;
+	line-height: 1;
 	vertical-align: middle;
 }
 
@@ -174,7 +174,7 @@ th {
 
 .btn {
 	margin: 0;
-	padding: 5px 10px;
+	padding: 0.25rem 0.5rem;
 	background: #3498db;
 	color: #fff;
 	font-size: 0.9rem;