Remove duplicate CSS rules to improve maintainability (#2111)

## Description:

This PR removes duplicate CSS rule definitions.

.lobby-id-box - Removed duplicate definition, keeping the version with
appropriate margin
.options-section - Consolidated identical duplicate definitions
.option-title - Merged duplicate rules with same styling
.players-list - Removed redundant duplicate definition
.chat-column - Kept the updated version with min-width: 140px

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

aotumuri

src/client/styles/modal/chat.css

@@ -7,13 +7,6 @@
   overflow-x: auto;
 }
 
-.chat-column {
-  display: flex;
-  flex-direction: column;
-  gap: 8px;
-  min-width: 120px;
-}
-
 .column-title {
   font-weight: bold;
   margin-bottom: 4px;