Add background color to themes

Author: dastarruer

src/options/config/style/themes/default.rs

@@ -18,6 +18,7 @@ impl Styles {
         const AVG_COLOUR: Color = Color::Red;
         const ALL_COLOUR: Color = Color::Green;
         const DEFAULT_SELECTED_TEXT_STYLE: Style = color!(Color::Black).bg(HIGHLIGHT_COLOUR);
+        const BG_COLOR: Color = Color::Black;
         const TEXT_COLOUR: Color = Color::Gray;
 
         Self {
@@ -59,6 +60,7 @@ impl Styles {
             selected_text_style: DEFAULT_SELECTED_TEXT_STYLE,
             table_header_style: color!(HIGHLIGHT_COLOUR).add_modifier(Modifier::BOLD),
             widget_title_style: color!(TEXT_COLOUR),
+            bg_color_style: color!(BG_COLOR),
             graph_style: color!(TEXT_COLOUR),
             graph_legend_style: color!(TEXT_COLOUR),
             high_battery: color!(Color::Green),

src/options/config/style/themes/gruvbox.rs

@@ -58,6 +58,7 @@ impl Styles {
             text_style: hex!("#ebdbb2"),
             selected_text_style: hex!("#1d2021").bg(hex_colour!("#ebdbb2")),
             table_header_style: hex!("#83a598").add_modifier(Modifier::BOLD),
+            bg_color_style: hex!("#282828"),
             widget_title_style: hex!("#ebdbb2"),
             graph_style: hex!("#ebdbb2"),
             graph_legend_style: hex!("#ebdbb2"),
@@ -123,6 +124,7 @@ impl Styles {
             text_style: hex!("#3c3836"),
             selected_text_style: hex!("#ebdbb2").bg(hex_colour!("#3c3836")),
             table_header_style: hex!("#076678").add_modifier(Modifier::BOLD),
+            bg_color_style: hex!("#fbf1c7"),
             widget_title_style: hex!("#3c3836"),
             graph_style: hex!("#3c3836"),
             graph_legend_style: hex!("#3c3836"),

src/options/config/style/themes/nord.rs

@@ -46,6 +46,7 @@ impl Styles {
             text_style: hex!("#e5e9f0"),
             selected_text_style: hex!("#2e3440").bg(hex_colour!("#88c0d0")),
             table_header_style: hex!("#81a1c1").add_modifier(Modifier::BOLD),
+            bg_color_style: hex!("#2e3440"),
             widget_title_style: hex!("#e5e9f0"),
             graph_style: hex!("#e5e9f0"),
             graph_legend_style: hex!("#e5e9f0"),
@@ -99,6 +100,7 @@ impl Styles {
             text_style: hex!("#2e3440"),
             selected_text_style: hex!("#f5f5f5").bg(hex_colour!("#5e81ac")),
             table_header_style: hex!("#5e81ac").add_modifier(Modifier::BOLD),
+            bg_color_style: hex!("#e5e9f0"),
             widget_title_style: hex!("#2e3440"),
             graph_style: hex!("#2e3440"),
             graph_legend_style: hex!("#2e3440"),