fix: translation file syntax

Author: ilya-zlobintsev

lact-gui/i18n/en/lact_gui.ftl

@@ -62,9 +62,9 @@ speed-change-threshold = Speed Change Threshold (°C)
 automatic-mode-threshold = Automatic Mode Threshold (°C)
 automatic-mode-threshold-tooltip = Switch fan control to auto mode when the temperature is below this point.
 
-Many Nvidia GPUs only support stopping the fan in the automatic fan control mode, while a custom curve has a limited speed range such as 30-100%.
+    Many Nvidia GPUs only support stopping the fan in the automatic fan control mode, while a custom curve has a limited speed range such as 30-100%.
 
-This option allows to work around this limitation by only using the custom curve when above a specific temperature, with the card's builtin auto mode that supports zero RPM being used below it. 
+    This option allows to work around this limitation by only using the custom curve when above a specific temperature, with the card's builtin auto mode that supports zero RPM being used below it.
 
 amd-oc = AMD Overclocking
 amd-oc-disabled = 

lact-gui/src/app/graphs_window/plot_component.rs

@@ -158,7 +158,7 @@ impl relm4::factory::FactoryComponent for PlotComponent {
 
                     append = &gtk::Button  {
                         set_icon_name: "edit-delete-symbolic",
-                        set_tooltip: "Delete graph",
+                        set_tooltip: &fl!(I18N, "delete-graph"),
 
                         connect_clicked[sender, index] => move |_| {
                             sender.output(GraphsWindowMsg::RemovePlot(index.clone())).unwrap();